1) No (other than anything written in the MOTD, thats it).
2) Up to you and your opponent. Different starting alts by choosing starting fields (low, medium or high), but whether you stay there or not depends on your agreement with your opponent. Once you merge, there are no rules. This isnt a test of aircraft tolerances, its a test of your ACM vs his/her ACM, and how well each of you knows the plane you are flying. Good luck.
3) No.