There are melt and our kits here; they will come with everything you need and instructions.
If you don't want a kit right now then I would say that 1 or 2 pounds of Melt and Pour, an ounce of fragrance and the smallest sized container of mica (usually 1 oz) would work to start. It does depend on your mold but you can usually get about 4 bars of soap per pound of melt and pour.
You can also purchase a mold or use anything 'tupperware like' that you have around the house.
A spritzer bottle of alcohol helps give the soap a nice, smooth look and saran wrap is good to have to wrap the soap with after you are finished.