How do u get a 2 month old colt to let u touch him?

ok so we just bought a mare and her 2 month old colt. the last owners didnt have anything to do with him. he doesnt have a halter on. He will only let u rub is head sometimes. He will eat food out of your hand. I know we need to b handling him more and he needs a halter on. So whats the best way to go about doing that? Any help or suggestions would be great thanks