An F1 uses a VCU for its 4 wheel drive - that’s super-important to have matching tyres (and therefore diameters).
The F2 uses a Haldex system for its 4 wheel drive management, which is more forgiving. In an ideal world you’d do all 4, but if...
No, I have an AP200, programmed to LR, which people are welcome to use on the day.
The KM100 is specifically for key programming I think, quite specialised.