It takes R=134a The high and low fittings are pretty obvious under the hood. If you don't know what they look like you do not have the background knowledge to work on this system and should get a knowledgeable person to help you.
Premium unleaded , 91 octane or higher ( according to the 1996 Lincoln Continental Owner Guide )
An inert gas such as argon.
The flammable kind.
the kind at the pump, liquid perhaps...
17 city 26 highway
unleaded. 87 octane unless in high alltitude
93 octane or higher.
The light comes on and goes off when you have 2 gallons of gas left & the light stays on when you are on your last gallon of gas.
its a gas that goes into it not a liquid. You will need to retrofit your car for the new gas as R-12 has been outlawed. The new gas is called R-134A
87 should be sufficient
93-95 octane recommended