Multiple images upload

Hello everyone. After spending some hours searching the web finally i decided to ask you, how to some vital questions:
1) How to upload multiple files to my blog (i mean images). I have only browser upload possible (maybe because i use Flashplayer 10, or something). I also tried to upload files manually via FTP, but this didn’t help – files didn’t appear in my blog.
2) Even when i upload image after image, when i open WP gallery, images are resized to very small size and i don’t like this. How can i solve this problem too?

Sorry for dumb questions, but it’s getting me so frustrated.