94 town car leaking coolant

Can't tell you what is leaking or the fix,
without seeing the car

May be the water pump,

Could be either one or a hose at is leaking. I check for leaks using a paper towel and wiping areas I suspect are leaking.

Wow!
The first thing you need to do is fill the coolant up again and take it to a shop that you trust,have them pressurize the coolant system to find the leak,then repair it.
But my fears are that who ever check it for you last saw a head gasket leaking and didn't want to fix it so said nothing,Also if your seeing white smoke behind you that is an engine burning antifreeze.

Check the coolant temperature sensor housing in back of the engine. This is made out of plastic on some model years A4 and eventually leaks coolant.

Your brake light switch went out it also controls the shift lock mechanism.
Its located on the brake pedal and costs about 15.99

Just a heads up, $10 bucks will buy you a seal kit for the P.S. pump. I topped mine off for a couple months, then the oring on the high pressure line (from pump, front center) blew and dumped the reservoir in a matter of miles.

The line can be a stinker to get off, recommend driving the car for a few minutes to heat up the pump a little. Don't forget the 20MM wrench.

i think its going to be the head gasket duto the way its leaking coolant. one of the water jackets maybe i would have it checked to be sure but it sounds like head gasket

replace the distributor oil is leaking into the electronics of the distributor and shorting out pull cap back off and look and see if oil is leaking out

Hi,
The heating up as you build revs, to me, indicates a partially oped thermostat. If it hasn't been replaced, I would do so. It's inexpensive and easy enough to do. Make sure you get a gasket with it.
The rattling thing is another matter. Do you think it is the water pump that is rattling? Does it ever drip from under your engine all the time?
Just curious...
Hope this helps... Good luck!