The black one is a Cochin, and definitely a cockerel. The white with gold looks like a red/gold sexlink pullet. The blue one could be a Blue Andalusian.
The black one sounds like a black copper maran. The yellow and white an Easter Egger. The lavender one i have heard of the breed name befor but I can't remember the name. And the second picture maybe an Easter Egger. That's it like junebugg said blue Andalusian.
All I can say with certainty is the gold/white looks to be a Gold Sexlink, which would make her a her.
The other 2 need much better photos to be able to identify.
I'm not seeing Cochin in the black one as the tail isn't moppish enough, but I could believe Marans....if I saw it in full profile standing upright. I need to clearly see legs, feathering, and shanks. I can say if it has yellow feet and heavy leg feathering, it is likely a banatm Cochin or possibly Cochin mix...but again it doesn't look very Cochin to me in that photo.
Grey bird...I've had lots of grey birds...from a lot of mixes. You can have Blue Marans as well. Yes, it might be Blue Andalusian, but I'd need to see full profile, in particular if it is starting to show white earlobe. It could even be Blue Marans as American Marans have no leg feathers (which by the way should be only on the outside of the leg down the outside toe for a Marans).
However, none of them are EEs by the typical sense. There are no signs of that (green legs, beards/muffs, pea combs).
Can you get better photos so we can see them standing upright in full profile?