On themeforest the description of the theme says BuddyPress template pack is required for this theme which is strange as since BuddyPress 1.7, WordPress themes benefits from the BuddyPress theme compat feature.
If the plugin BuddyPress template pack is activated and has been run on this theme then it might be the cause of the trouble. You can try to edit the functions.php file of the theme in the function that is called when after_setup_theme is hooked adding :
add_theme_support( 'buddypress' );
You can also test your theme on a local dev without activating the BuddyPress template pack to see if the toolbar loads.
If the template pack is not activated and your theme doesn’t have folders like activity
or groups
Then as it’s a premium i’m not able to help you more. Sorry.