How old are they? Besides the White Crested Black Polish (cute picture) the half black and white one looks like a Ancona, the two reds look like Red Sex Links (Red Star, Golden Comet etc), the one that is mostly black with some white shaking its head in the picture looks like a Silver Laced Wyandotte, if the brown one has a peacomb it could be a Buckeye, the two white ones look like meat birds / Cornish cross .... the brown chick looks like it has a lot of comb from that picture.
Something likeThe 6 weeks. That's with guessing they were a couple weeks old when we got them. I know the dark red is a new Hampshire red as well as I have a few cornish. I really didn't know it was all that complicated when we got them and just did a " I want that one...and that one..." lol.