Hens go broody when you don’t want them to… and won’t go broody when you do. 
Agree they're all cockerels.
And there's not a drop of Ameraucana blood in those birds, sorry. So the seller really doesn't know what they're doing. I can see one parent being a Red something, but no Ameraucana. They're all mixed breed birds, maybe some barred Rock in the two barred (they're going to be very pretty by the way, too bad they're male), the others could be second generation sex links or a mix of several red and white breed birds.
So sorry your chicken adventure has started out this way. Chick days are coming to a lot of feed stores, you may have better luck there. Or, try looking on your state thread here on BYC, someone near you may have birds for sale. Feel free to post pics before you purchase from a private seller, we can help confirm breed and gender (depending on age) before you buy.
