Whatever toolset you decide on, you'll most likely need to get
1.5 mm hex driver
2.0 mm hex driver
2.5 mm hex driver
3.0 mm hex driver
5.5 mm nut driver
7.0 mm nut driver
0.050 hex driver
0.063 hex driver (1/16)
If you run 1/12 scale with SAE hardware (CRC, SpeedMerchant, BMI, etc), you'll most likely need
0.078 hex driver (5/64)
0.093 hex driver (3/32)
3/16 hex driver
body reamer
For Associated and Serpent side link screws, you'll need a 1.3 mm MIP hex driver.