Drive-off speed encoder in the gearbox and brake switch

Hi!
Since my V8 Bj 88 3,6 only starts on manual I had error memory read out.
The following errors
all four ABS sensors false or no signal

Derivative speed encoder

and

Brake switch


How do I get this drive-off speeder extended?
Brake switch, is it down on the pedal?
What causes there are that all four ABS sensors are displayed, which are all 4 'caputt is peculiar. It's very rare, isn't it?

Is it because of these mistakes that the car only starts manually, but then turns on E or S when you are in motion?

Another question, in the fuse box a relay with a fuse slot is integrated in place 10, for what is this relay and does not belong to the fuse?

Thanks for help, Mfg

Hias