What kind of maintenance does a 1996 Crown Victoria with 134,000 miles on it need?

I would have the transmission serviced, have the brake fluid changed, have the differential lubricant changed, have the fuel filter changed and change the spark plugs and coils if needed. An oil change would be good if it was time to do so also.

Bob has it covered but I would change the air cleaner too.

And the serpentine belt and possibly the tensioner.