As of right now, the one in the second picture is your only cockerel. If the others in pictures 3 and 4 start turning pink, they are also.
As to the breed question, they may be some sort of hatchery stock RIRs, or more commonly known as Production Reds. On another thought, they could possibly...
You need to please provide a picture in a natural light source, it's way too hard to tell right now. If you could do that we can more easily sex you're chicks for you.