He is the x-men's team leader, and he is invulnerable to the affects of his own power, so if his optic blast was shot back at him, he wouldn't die. Also he is married to team mate Jean Grey and he is headmaster of the Xavier Institute.
He functions primarily as the leader and master tactician of the X-men, but is essentially in charge of most of mutantkind. In combat, he functions as leader and tactician, is able to hold his own in...
no, but, like his power is optic blasts, which can burn through anything, he is invulnerable to this affects, which means that if his blast is shot back at him, he wouldn't die.
yes, he hes the mutant ability to shoot a ruby-colored optic blast from his eyes, he cannot control these blasts due to a head injury, so therefore he has to wear ruby quartz sunglasses od visors....