You need developer, fixer, wash aid, and rinse aid (Foto-Flo), a tank and reels, a thermometer, chemical storage bottles, and graduated cylinders to mix your chemistry in . Oh, and some kind of clips to hang the film to dry on. You can use an acid stop bath, or you can just use water. As to tanks and reels, well, I personally recommend stainless steel reels and tanks. Some folks feel they're harder to load than plastic reels, but with a little practice they're quite easy to manage. The upside to stainless is that it holds temperature better, so if you need to use a long development time, it won't cool down as fast. There's good stainless and there's cheap stainless. DO NOT TRY TO ECONOMIZE ON YOUR STAINLESS REELS. You will hate yourself and you'll wreck film. Hewes and/or Jobo stainless reels are the best. They are smooth, the spirals are consistent, and they're easy to get the film under their clips in the center of the reel. They're also made of a heavier gague of steel, so they won't bend or break if you inadvertently drop them (which you probably will, in the sink, while unloading your finished film, or worse, on the floor).