What I mean is how much a percentage do I get from adsense, do I have to pay for it, and can I choose the ads to put up on my site. And how should I go about ti? PS: I'm a noob .... guess you already know that by now.
There is no fixed percentage that you get. You do not need to pay for it. Yes, you can choose different ad formats. You can apply to the adsense program by visiting http://www.google.com/adsense In future please make an effort to read some threads already posted as it will provide you a lot of information.
You should go to the Adsense support site and read the "Adsense Basics", which will explain how Adsense works, and if you are eligible to sign up. https://www.google.com/adsense/support/