How to delete the title, change margins

I want to make a few modifications to my forum but I?m not sure what code to edit in the .css files.

I want to delete my forum title and just have the menu at the top.
I also want to change the original side margins of the forum from the about the 1cm margin that there is now to 0. 
And I want to add some ads above the forum menu.

I don?t know whether this is a punres.org question but when I clicked on the link I get the following message.

Punres.org

This PHP environment doesn't have Improved MySQL (mysqli) support built in. Improved MySQL support is required if you want to use a MySQL 4.1 (or later) database to run this forum. Consult the PHP documentation for further assistance.