Bidvvertiser can work but you have to select which ads will show on your page in the options area. Otherwise un-relevant ads are shown. If you're just starting out Google adsense might be a better option as it will do this for you quite efficiently.

also, you want to have your ads look like links in the page... don't trick people but what you don't want to do is have a black background with a big white square with ads in it. if that makes sense.