Fatal Error Message and Site not Working!

After downloading a plugin (DB Toolkit), I tried to hit “activate plugin” and a Fatal Error message came up. Any button in the admin panel brings up something like this:

Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 10 bytes) in /home/comcoil/public_html/test/wordpress/wp-admin/includes/media.php on line 471

I can’t use the admin panel, the site is showing up as a blank page (comcoil.com), and I have no idea what to do!

Help!!!