Yes, I would not have got him if I didn't feel so sorry for him. He is very friendly though, which is a plus.
Yes, but given that he is hatchery stock I am not surprised that he isn't fluffy. I believe many hatchery birds do not have that characteristic (I have two hens from Privett hatchery, one is fluffy the other is not so much).
I don't think so, buff Orpingtons are supposed to have red earlobes to my knowledge. Perhaps yours is also part Leghorn?
Interesting, so you think he is not a Buff Orpington at all? I should add that he weighs at 3.5 lbs, which (though he could be stunted).