Does it have a peacomb (flat)? He looks like a dark Brahma to me. If he has a straight comb, he might be a cochin. Langshans and Faverolles also have fluffy feet, but langshans are supposed to be lightly feathered and Faverolles have muffs and five toes.
Yes. I would say Dark Brahma. The gender would be hard to tell at this age, but knowing that it is a freebie from Murray Mcmurray I would say probably a rooster. It seems mostly that way when they send a free one.