If I use high payment keyword then how the adsnse will behave with me for registration and after so on?
You never know how much a keyword is going to pay until you have recieved clicks. Also it all depends on your marketing. Are you successfully marketing your site or do you need help with the matter. If you need advice send me a PM (private message)
They will never penalise you for too many clicks or too high a priced clicks, as without adsense Googles earnings would plummet, the "too many clicks" and the "I have earnt too much today" are just Internet myths and bullshit. Don;t click on your own ads and you will be fine.