I am saving an iguana from a house that burned down and he was badly hurt he will not eat and he will bit.what

a friend gave me an iguana that was in a fire and his tall is half burned off and his face was burned a bit it has hild a little but he will not eat and he will not even let me hold him i want to save him i have two other ones but this is bad so some one help me with him give me some advise on what to do.thank you jennifer