A slide-out drawer bottom works better than one you have to dismantle the cage to clean out where he has messed. Cover the bottom with newspaper, sand or other similar materials to absorb urine and feces. Change about every three days to insure cleanliness and prevent diseases from occurring. Make sure the cage sides have both vertical and horizontal bars. He will want to climb and needs adequate footholds.
Most cages come with perches.
The more uneven and bumpy the branch, the better for the bird's feet as it provides exercise for him, and keeps his nails trimmed. The ones with sandpaper have been linked to foot problems. Make certain the wood being used has not been treated with any chemicals before usage. Using branches also provides vitamins for your bird, as he will chew on them often. Replace as needed.