If the roo is one breed and the hens are all of different breeds than him, then they are all crosses, not breeds.
The barred one is half barnevelder and half marans. It is a boy because barring is sex linked so this kind of cross always gives barred boys and non-barred girls.
The gene that causes the silver color pattern ( black and whites like silver and light sussex) is also sex linked so the barnevelder bred with your sussex will give black and white boys and black and brown girls.
The ones out of warren would be a little tricky as they will come out black and brown or brown with white details. This is not sex linked so the ones out of the warren will just have to wait on them being old enough to sex unlike offspring from the other hens.
When the chicks are old enough to have well-colored legs and skin, the yellow legged/skinned brown and black chicks would be from the warren and the ones with white or pink would be half sussex. This is because white skin is dominant over yellow skin.