I'm not currently on meds or seeing anyone for depression issues, but I was in the recent past (within the last 2 years), so I'll try to help you out a little.

1. My family's insurance covered one visit per week and my copay was $15. If you don't have insurance, most communities have mental health services available through state or county agencies on a sliding pay scale.

2. I went once a week, per my insurance, and for me it was enough. Like sycld said, everyone is different though, and your needs will probably change throughout your treatment.

3. My copay for generics was $10 for a month's worth.

I also agree with sycld, I don't think antidepressants are the cure all either, but I know they helped me get a jump start when I was dealing with some really heavy shit going on in my life. They at least moderated things well enough to let me start to cope on my own again, something I was totally unable to do up until that point.