If the battery was dead or disconnected all trouble codes will be erased.
Dead battery? Battery cables in need of cleaning or replacement?
I had this problem and it was my battery,but could also be in need of antifreeze.
A clicking sound when you try to start the car is a dead battery. It may be that the alternator is not charging it properly.
start inhibitor relay located next to battery in fuse/relay compartment
This is not possible on a modern vehicle like the Villager.
I would start by purchasing a repair manual.
The car doesn't run right, that's what happens.
To disable the factory alarm on a 2000 Mercury Villager, put the key in the ignition and turn it halfway. Let it stay in the spot for 10 minutes and start the car.
battery low
There is no power steering in a Mercury Villager at start up in cold weather due to a failing pump or low fluid. Fluid becomes much thicker in cold weather and is much harder to pump.
your battery was dead.
You don't. The ignition is required to start the car. If it fails you need a new ignition switch.