The thermostat is inside the housing on the front of the engine. The housing attaches to the front of the transfer tube assembly. It is somewhat difficult to get access to with removing of a number of things. These housing use no gaskets and must be sealed with silicone.
In front of the engine, down in the "V".
depends is it the thermostat housing or the gasket. it is either connected to the hose or the water pump
The bulb end goes toward the engine.
At the front of the engine under the housing that attaches to the coolant crossover tube assembly.
There is no such part on a Mercury Villager.
Under the edge of the tailgate.
On a Mercury Villager ( being a front wheel drive vehicle ) The transaxle ( transmission ) is located in the engine compartment to the drivers side of the engine
yes!
System airbound and needs to be purged
The alternator is mounted down low on the back side of the engine.
The 1995 Mercury Villager turn signal relay switch is located beneath the drivers side dashboard. The turn signal relay switch will be left of the brake pedal.
It's part of the range switch on the transmission.