You should just get the basics if you want to keep it low cost. Pot, ladle, mold, and lead. Also, safety glasses, gloves and long sleeved shirt! Naturally you'll need a heat source, but not in the kitchen and preferrably not in the house at all. I'd get a propane burner and set up on the patio, or somewhere with a good breeze to blow the lead fumes away from you.