The thermostat on a 1995 Plymouth Neon is right behind the Radiator Cap.
Follow the top radiator hose down to the water oulet on engine; it is located in the outlet.
You don't
Green
Take the filler neck off and the thermostat will be right there
it is either on the side of the head or on the thermostat housing
Basic neon tire size is P185/65/14
12.5 gallons
That information is unavailable until the 1995 Neon. I hope you didn't buy a 1984 Neon .
It is under the plastic housing that the upper radiator hose hooks to on the engine.
5w30 or 10w30
Check plugs and wires
Any name brand 10w30 or 5w30