All of the barred rocks and the Orpington look like cockerels to me. The wyandottes are harder to sex at that age, so I would post some more pictures in about two weeks or so. Cochin looks like a pullet
Well in the coop you will need nesting boxes (I would say 3 for that amount of chickens), a roost (at least 8 feet of it) and food and water.
As far as the run, you will need a minimum of 10 square feet per bird, so 80 sqft in your case. Water and perhaps a perch or some larger items so they...