The black, blue, brown and blue, and the white with a little orange are Easter eggers.
The mostly red with a white tail is some type of red sex link.
The thinner, longer white one is probably a Leghorn.
The feather footed one is a light Brahma.
One salmon Faverolles.
The heavier white ones...
The first and last one might be Egyptian Fayoumis. Either that or Easter eggers.
The black and white one you thought might be a Houdan is probably a Lakenvelder.
The buff/white one with the little floof on its head could be a really off buff laced Polish. I can think of nothing else that might...
Keeping them in a secured run is the only real way to protect from birds of prey. Even constant vigilance is not enough with free rangers because goshawks are very stealthy and can strike in the blink of an eye.
In my opinion, the white crested blue Polish is a cockerel. The lavender Orpington is kind of in between. It could go either way. But that variety tends to comb up early, so there is reason to be hopeful.
Yes, it is looking like a cockerel. Comb and wattles are large and red for the breed. Male specific feathering doesn't usually come in until later, after 12 weeks.