You should not assume that all these errors are connected.
Cutting out, with a low fuel pressure error can be caused by a faulty in-tank pump, or a problem with it's power supply like faulty relay or burnt connections in the fusebox (engine bay). What exactly was the code and description of the relevant error?
Brake switch error - have you adjusted the switch correctly? Have you checked that the brake lights are operating correctly? Also, sometimes the pedal itself does not return as it should.
MAF error - what exactly was the error? If it was "incongruence" or "invalid signal" then this error can be triggered by leaks in the induction system including a sticking EGR valve.
Parking sensors - have you checked that the reverse lights are working? Failure of the reverse switch is quite common, as are wiring issues into the boot lid, resulting in short circuits.
Stalk button failure - another favourite! Often the result or broken wires inside the column stalk unit. Repairable, but a little tricky.
And ... I have to ask... have you checked the fuses?