#1 is a Sussex pullet
#2 is maybe an OE. Definitely a boy though.
#3 not positive on breed, but I don't think it's a Sussex. She is a pullet though.
#4 definitely not a Sussex. I'm thinking EE or OE. I'm going to say pullet.
#5 I don't think this one is a Buff Orp. The feathers look too white...