As for sex, the second one with the barred feathers looks to be a roo, but it is still a little early on EEs to tell gender.
In two weeks you may see more differences in the hens and roos.
the 2nd on to the left in the second pic is my strongest candidate for roo so far, it's comb is bigger and redder and it's always the biggest pain in the butt to catch. I'm *really* hoping he's the only one (crosses fingers) but out of twelve I'm not getting my hopes up yet. (not too much anyways