How do I revive my front shock?
Depending on the age, personal attachment, and value of the fork, you could have it rebuilt at you local bike shop. However with it being close to 20 years old you might be just as well suited to purchase an inexpensive replacement fork.

You should be able to get something like a Suntour for a relatively inexpensive amount. You might check your local classifieds for a used fork as well to save some money. Weigh how often you use (or plan to use) the bike against how much money it would cost to replace/rebuild and decide if it fits your budget. No need to pay $100 to hang it back on the ceiling for another 20 years :)