I highly recommend a box mod.
check this mod out
you'll also need batteries, wire, cotton, a charger, and an atomizer
also make sure you have drill bits! If you don't, you'll need a coil jig
also if you don't have (somewhat) sanitary pliers, you'll most likely need this
WARNING: Mechanical mods are very dangerous if not handled properly. Only use chemistry safe IMR batteries and always use an ohm-reader! You could risk toxic gasses, fires, or even explosions.