How many PPC (Pay Per Click) site in the world? Which one has best paying rate? And how much pay for each click?

I have a small blog http://www.rugbylivestreaming.com.au/. I want to use PPC ads for it. Need sugession asap.

The position of the advert is determined through a bidding system whereby, in simple terms, the highest bidder gets the top position. The marketer only pays for the advert when the person searching, clicks on the link to visit the advertised site.