An ingot mold is nice to have, to change your raw materials into useful sized chunks. Also heavy gloves and eye protection on the safety side. Lots of guys use stuff that they have laying around for tools etc. Like I use an old hickory hammer handle for tapping the sprue cutter around, a dowel works too. If casting inside, make sure you have some way of getting rid of the fumes, they can be a health hazard, especially if melting down tire weights which can get real stinky.