Coops - We repurposed an old shed into a coop that has worked well, but the placement isn't great. We made a hoop coop last year which has served its purpose and have plans to build something bigger and more functional using pallets, hopefully over the winter.
Feed - Our local feed and seed sells Winner brand, I think it's pretty local if I remember correctly.
Breed of Chicken - I started out with 3 Black Sex Links and 3 "Rhode Island Reds" (aka Production Reds) 3 years ago. At least two of my three left are still laying. I lost 2 BSLs this year, one just disappeared (I am 99% sure she was having some egg issues, no feathers or anything left behind... not sure if she just hunkered down somewhere, or what) the other had poultry lice and I think the combo of that and the heat plus going broody just kind of took it out of her.
This year I got 8 more "RIRs" but it was a dud batch or something. None of the 8 were growing or feathering out, even at 15 weeks old. A snake got 4 one night, so I moved them, then either the same snake or another found 2 more of them there. The other two went home as a freebie with a kid at our yard sale with full disclosure that I had no idea what was wrong with them.
One friend surprised me that same day with 3 Blue Laced Red Wyandottes, still waiting so see which one crows first (and hoping that at least one might be a pullet!) and then another friend had too many so I got her extra 2 Easter Eggers and 1 Barnevelder. Wasn't thrilled with the prospect of only 3 layers next year, if I was lucky, so I picked up 10 Black Australorps from Southern States (1 marked cockerel, but I have my suspicions that I actually have two just based on the feathering out after a week).
Bedding - One coop has shavings, the hoop coop is on bare ground with grass clippings from the yard since they are not yet free ranging with the others.
Where you plan to order your chickens from - I got my first two batches from the local feed and seed, the last 10 came from another tractor supply store. I was too nervous to order by mail.