i wont be able to answer all questions but here are some answers

Best Paid to Click Site
http://adbux.org/?r=
http://linkgrand.com
http://www.copperflame.com

There may be more but these are good

Paid to Click Sites work like this. There are links you click a link which will open a new window you will view it for a specified time varying for 15-30 seconds or maybe even more

Then you are credited. Once you reach the minimum payout you can cashout.
You could earn a lot if you have around 10 referrals.

edit reasons:referral link removed