Try getting a sideveiw of him/her, I think in the first picture he/she might be a Roo, how old is he/she ? and the one below might need a side of the picture too. I know my roo if you put him on his back he goes crazy, my hens just let you hold them on there back not much kicking.
I also think the top picture is a Barred Rock, maybe mix? looks like he/she might be still getting the feathers in, unless that's just fluff and the bottom one looks like a Brahma Maybe she's a cutie. But it seems like Roo's get their comes and wattles a lot faster then the hens/pullet's. chickens are such a joy! Mine'll soon be laying lol. Goodluck~
Their first crow's are cuuuute ! Specially when they don't have the hang of it yet. My Roo started crowing a few weeks ago I think, about before we moved him and the pullets outside its cute X3