Assuming the car has a hydramatic in it, you'll want to use Dexron-Mercon fluid. It's today's version of the old Type A fluid. There is a filter under the large pan, remove it and you'll see the filter. It's the reusable type so just clean it and the pan and reinstall.
There's also a drain plug on the converter. To access it, remove the inspection pan (the half-round cover that's behind the oil pan).
The rear end uses 90W gear lube.
