The only thing that will cost more if its not fixed/serviced is the timing belt. It can wait till just before 105K but don't go much past. You're looking at several 100 dollars of work so be prepared.

Theres lots of info on this site as to what to replace along with the belt. The logic is since the mechanic is already there, spend the extra $ on the part, labor is negligible. All belts, hoses, T stat, seals and water pump. Can you do this kind of work yourself? If not be sure to check several places for price, it usually varies greatly.

Shocks are cheap and you can do that yourself. Weak shocks wont toast your engine though. Just be sure you can afford the timing belt when its due.