These answers have you pretty well covered. For most every load, you will need:
-Hulls
-Powder
-Scale
-Wads
-Shot
-Buffer (usually PSB buffer from precision reloading)
-Crimping device (fold with a press or roll with a bit).
-If roll crimping, overshot card.
Depending on the specific recipe, you will also need some of:
-gas seal
-nitro card
-cork spacers (particular thickness)
-felt spacers (particular thickness)
-mylar (between the shot and hull)
All recipes I've seen call for new primed hulls of a particular variety. Do not substitute hulls unless the substitute has been pressure tested. Primer, base wad, internal volume all play into pressure. If you buy from Hal or another reputable shot supplier, the recipe data has been tested and the loads are safe. Some hulls are ok to substitute. Others are not. Don't guess.
Usually fold vs. roll crimping is personal preference. If you're only making one type of load, you can get the height adjusted on your press and fold with no problem. If you're making multiple loads to test or for different guns or different applications, the overall length will usually be a little different. Adjusting the press every time can be a pain. Plus, with new hulls, you'll need a star bit crimp starter to fold. With a roll crimper, the hull length doesn't matter. But for roll crimping, I strongly recommend using a drill press. I have a table-top drill press from harbor freight. ~ $70.
There are other lille things that are extremely helpful depending on which gauge you're loading. You can trim hull length very clean and easy with dowel rod and exacto blade. A small pipe tamp is great for seating wads. You'll need something that vibrates to settle the buffer into the shot - large hair trimmers, brass tumbler, "personal massager," etc. And some type of block/caddie to hold the hulls while you're loading a batch.