Please answer my question about horses?

How can you tell the age of a horse in a simple and easy way? how long do horses usually live for? Would 'Akbar' be a good name for my horse (rural side of asia, village)? How, Why and When do you rubb horses down? Can any1 show me some videos of a horse kneeling down for a rider to get on? Should I get a mare or a stallion ( Marwari breed or Arabian Stallion).