Ads and Font size
 

I want ads here:
http://www.xl7.eu/uploads/1251734453.png

How do i go about that?

Also, you see the header where it says "Welcome, Game Servers, Dedicated Servers" etc. How do i change the font for that, because no matter what i try with divs, or ids it doesnt work (in the header) i have to change the boards font size to change the font size on the header.

Mainly ads is priority though.