An all-wire cage is best, but if wood is needed, try and keep the amount of wood available to the rabbit inside the cage or hutch at a minimum. Cages should be kept out of drafts, away from predators, and out of the weather. Also, they should be kept in the shade, because rabbits are very susceptible to heat and can get ill if they are not well-cooled. A sitting board should be provided for larger breeds and for rabbits which have a thinner hair surface of their feet. This is to prevent sore hocks.
Pellets are the best bet for pet and show animals alike.
They contain most if not all of the nutrients a rabbit needs to stay healthy. Several different brands and formulas exist, so ask your pet shop employee or feed store worker to help you choose the correct feed. In my experience, pellets are cheaper in feed stores, and if you have quite a few rabbits, it may be helpful to buy in bulk. Just be warned that feed does go bad, so watch for mold that can make your bunnies sick. The amount to feed a rabbit depends on size and situation.