Different manufacturers have different part numbers for the parts, your best route is to go to your local auto parts store and scan the manufacturers' manuals for the part numbers you need.
On the brake pedal.
On the brake pedal assembly.
Just normal DOT3 brake fluid.
It is self-adjusting, normally.
This is usually cause by a stuck brake light switch on the brake pedal. Replace it.
In a repair manual or online.
Mounted to the firewall on the driver's side.
If the brake lights stay on that probably means the switch on the brake pedal that activates them is defective.
The brakes on the Villager are as straight forward as the brakes on a 1965 Mercury. Only normal brake tools are required.
On the firewall near the brake master cylinder.
Remove the two slider screws that hold it in place.
Brake light switch needs adjusting or replacing. It is too sensitive.