My basic dips are, FX (caramel), Almond, Bunspice/Cinnamon, TCP, Devilsfork (Garlic/Almond), Gurgle (TAC, TCP Almond FX combo) and some fruit flavours.
Cake Flour or Semolina to make dough.
Floaties (mostly plain, but I always seem to have almond and cinnamon flavoured ones these days)
Mielies (Supercast plain)
Traces and materials for making traces.
A scale.
The rest you will just gather as time goes buy and you will be wondering "where did all this stuff come from and did I really use it at some stage?".