The only one that looks like a hen is the left hand one in the first picture. All the others look like roos to me. I have an 8 week old EE Roo, and his comb looks that red, but my hens don't get red combs or faces for a long time. Sorry!
The first one in the last set of pics (buff?) is a girl, the 2nd one hard to tell but I would say boy. I could tell on mine because the boys' combs got three rows of little bumps and the girls only had one row.