Www Google Adsense

I came to know that google has a fantastic offer named google adsense. If you allow Google to advertise in your personal website, then Google will pay you per visitor of your site? I wanna know is it really or just a joke? Does anyone has tried this? Do I need a credit card to get this offer?

Hi,
Do you think i can earn money with google if i open my site on a computer other than my private one, if i don’t login and click my ads? does it work also if i give the link to my friends and ask them to click my ads?

I want to get good with Google Adsense and like products really fast so I can earn money. I know it is a gamble however, I would really like to know how I could make money with the program. Can you suggest any books that would teach me how to make money with such products and name a couple like products other than google adsense?

There are many ideas about earning money using your own web site. But need to know what are the best ways. Specially when you do away with google adsense, can you still eran such money with other systes? CJ and Linkshare are not good places to earn money until your site become more famous. Adbrite pays a less amount. Any suggestions plz