Thats kind of a tall order, but I just started putting a darkroom together.
Enlarger: What kind? Thats what I had to ask. I went with an Omega c700. Nice so far, but haven't started printing yet. Have used the Bessler 23C II for awhile. I like these but because they are one of the most popular, people seem to hunt these up. I bought my enlarger on
ebay. Have had good luck going this route. You will need a lens, neg carrier, timer, and to make your life easier, a good easel.
You will need a light safe area, and install a safe light or two, depending on your room. This can be as simple as a screw in safe light.
Water source and drain will be helpful.
Then the chemicals and trays. Need minimum 4 trays, I like 11X14, but I don't go above that in enlargement.
You will need to set up an area for drying. Can be as simple as a nylon screen spread between a small span.
then the various other things: Tongs, grain focuser, squigee, the items for developing b&w film if your going to do that, paper and maybe a safe for the paper.
Please add other things I have forgotten.