1. How much parry/dodge/ I need to have in (MoP)
2. How much mastery (it says I have 55% in wowarmory and in game it says I have 25% (block)) where should I check? in game it says 11% block and 51% crit block or something like this.
3. Where will we raid at the beginning of MoP (whats the first raids)
As idefiler6 said, please review the guide at the top of the page, which should have all the information you need on tanking. As well, Google and our front-page news have piles of information on the raids you'll be encountering.