wp-admin & wp-login.php not working

I have zero access to wp-admin or wp-login.php for a WordPress blog I am trying to access.

wp-admin shows the following errors:

Strict Standards: Redefining already defined constructor for class wpdb in /home/sarahfobes/sarahfobes.com/wp-includes/wp-db.php on line 56

Deprecated: Assigning the return value of new by reference is deprecated in /home/sarahfobes/sarahfobes.com/wp-includes/cache.php on line 36

Strict Standards: Redefining already defined constructor for class WP_Object_Cache in /home/sarahfobes/sarahfobes.com/wp-includes/cache.php on line 384

Strict Standards: Declaration of Walker_Page::start_lvl() should be compatible with Walker::start_lvl($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 541

Strict Standards: Declaration of Walker_Page::end_lvl() should be compatible with Walker::end_lvl($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 541

Strict Standards: Declaration of Walker_Page::start_el() should be compatible with Walker::start_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 541

Strict Standards: Declaration of Walker_Page::end_el() should be compatible with Walker::end_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 541

Strict Standards: Declaration of Walker_PageDropdown::start_el() should be compatible with Walker::start_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 560

Strict Standards: Declaration of Walker_Category::start_lvl() should be compatible with Walker::start_lvl($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 659

Strict Standards: Declaration of Walker_Category::end_lvl() should be compatible with Walker::end_lvl($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 659

Strict Standards: Declaration of Walker_Category::start_el() should be compatible with Walker::start_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 659

Strict Standards: Declaration of Walker_Category::end_el() should be compatible with Walker::end_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 659

Strict Standards: Declaration of Walker_CategoryDropdown::start_el() should be compatible with Walker::start_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 684

Deprecated: Assigning the return value of new by reference is deprecated in /home/sarahfobes/sarahfobes.com/wp-includes/query.php on line 21

Deprecated: Assigning the return value of new by reference is deprecated in /home/sarahfobes/sarahfobes.com/wp-includes/theme.php on line 540

Warning: Cannot modify header information – headers already sent by (output started at /home/sarahfobes/sarahfobes.com/wp-includes/wp-db.php:56) in /home/sarahfobes/sarahfobes.com/wp-includes/pluggable.php on line 391

wp-login.php shows the following errors followed by the login panel that shows a cookie error when attempting to enter credentials:

Strict Standards: Redefining already defined constructor for class wpdb in /home/sarahfobes/sarahfobes.com/wp-includes/wp-db.php on line 56

Deprecated: Assigning the return value of new by reference is deprecated in /home/sarahfobes/sarahfobes.com/wp-includes/cache.php on line 36

Strict Standards: Redefining already defined constructor for class WP_Object_Cache in /home/sarahfobes/sarahfobes.com/wp-includes/cache.php on line 384

Strict Standards: Declaration of Walker_Page::start_lvl() should be compatible with Walker::start_lvl($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 541

Strict Standards: Declaration of Walker_Page::end_lvl() should be compatible with Walker::end_lvl($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 541

Strict Standards: Declaration of Walker_Page::start_el() should be compatible with Walker::start_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 541

Strict Standards: Declaration of Walker_Page::end_el() should be compatible with Walker::end_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 541

Strict Standards: Declaration of Walker_PageDropdown::start_el() should be compatible with Walker::start_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 560

Strict Standards: Declaration of Walker_Category::start_lvl() should be compatible with Walker::start_lvl($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 659

Strict Standards: Declaration of Walker_Category::end_lvl() should be compatible with Walker::end_lvl($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 659

Strict Standards: Declaration of Walker_Category::start_el() should be compatible with Walker::start_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 659

Strict Standards: Declaration of Walker_Category::end_el() should be compatible with Walker::end_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 659

Strict Standards: Declaration of Walker_CategoryDropdown::start_el() should be compatible with Walker::start_el($output) in /home/sarahfobes/sarahfobes.com/wp-includes/classes.php on line 684

Deprecated: Assigning the return value of new by reference is deprecated in /home/sarahfobes/sarahfobes.com/wp-includes/query.php on line 21

Deprecated: Assigning the return value of new by reference is deprecated in /home/sarahfobes/sarahfobes.com/wp-includes/theme.php on line 540

Warning: Cannot modify header information – headers already sent by (output started at /home/sarahfobes/sarahfobes.com/wp-includes/wp-db.php:56) in /home/sarahfobes/sarahfobes.com/wp-login.php on line 12

Warning: Cannot modify header information – headers already sent by (output started at /home/sarahfobes/sarahfobes.com/wp-includes/wp-db.php:56) in /home/sarahfobes/sarahfobes.com/wp-login.php on line 24

I’ve tried deactivating plugins and the theme, installing a different theme manually, uploading new/fresh files for wp-login, etc. Nothing has worked. I’m at my wits end! Please help!