No, you cannot.
They are run on the vehicles 12 volt dc electrical system.
No. You need 12 volt AC to run a 12 volt AC motor, not 12 volt DC.
No
1967 was the first year for the 12 volt system in the VW's.
Yes. Since the coil is run at full voltage when starting 12 volts may be too much for a 6 volt ignition coil. It would be at about 8 volts when running. There is a starting resistor.
the ford is a 12 volt system it has 2 batteries to help in starting . but it is a 12 volt system
12
No, you will need two 12 volt batteries connected in series to give the 24 volts necessary to run the pump. It will not run on 12 volts.
If you jump a car or other vehicle with a 6 volt electrical system using a 12 volt battery, you can blow out the 6 volt battery. When they are connected, it usually only takes a fraction of a second to start the six volt system. There should be a person ready to start the 6 volt system immediately if not sooner so the 12 volt system can be disconnected immediately before the battery overheats and burns out.
The 1952 Dodge truck line used a 6 volt electical system with a generator.
Separate the 2 12 volt batteries and charge them individually.
No! You would damage it beyond repair.