Affiliate Marketing Secrets

Hello!
What I know about Google Adsense is that you are paid through ” per click ” of the google’s ad on your page. Is there an option through Adsense of getting paid per 1000 views or impressions? Or can you please show me a source that will pay me through impressions? And how much can I get per 1000 impressions? (Please continue reading)
I currently have a blog of 5,000 members. It is very active, members are always using it, and its a success. It is a fact that 2,500 will at least move over, and still continuing to grow. Can you give me a rough est. of how much I can get through Google Adsense per click or any other options PER month? Can I at least get $500 a month to pay my loans for opening the website?
* ALSO please answer: What are affiliates websites? A website like Karmaloop is offers to join them as affiliates? I get paid from them to post their ads? Do I only get paid if I get them purchases or do I get like Base Pay + commission? thanks a lot.
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