Fatal Error

I was trying to troubleshoot my site by using wp_debug mode. I still had the dashboard, and it showed a plugin and the theme issues. So I deactivated them, put on a temporary theme.
Then I had this:
register_sidebar_widget is deprecated since version 2.8! Use wp_register_sidebar_widget() instead
and another widget error as well.
When I went to the function.php file to find the code it wasn’t in the file. I tried the “find & replace” function and it seemed to be putting it at the top of the file.
Now, after trying to change the wp_debug back to false to start over I have the white screen of death. I can’t get to my dashboard, can’t seem to delete any files through my ftp.
Any suggestions?

The page I need help with: [log in to see the link]