Hello Misternewt,
Welcome to CAP!
Promoting casinos can be extremely profitable. You can see an ongoing poll about income here: http://www.casinoaffiliateprograms.com/bb/showthread.php?t=789
It is hard work. The working environment changes constantly. You need to find a niche for yourself and apply yourself to it.
Sending traffic via ppc can work, but most will agree that having a site that presells is better.
re. google: you definitely cannot send traffic from there directly to casinos. Visit the sites you see advertised to see what they do allow.
Good luck, and I hope you will find everything you need here.