1 is a Salmon Favorolle 2 is a cinammon queen or a golden comet 3 is a Buff Orpington 4 is a barred rock or silver laced Wyandotte 5 is a lavender Orpington and 6 is a barred rock Cochin.
The third looks like a buff Orpington, the fourth a siverlaced wyandotte, and the last a cuckoo marans. But I would wait until they have fully feathered out and have become adults then ask again. It is easier to tell at that point. At this age, it is mostly guesses. But certain information can help. Where did you get them from? Do you know what breeds where available there?