Mate. Your car is like 20 years old. Expect that the rubber bits (seals, hoses, etc.) needs to be replaced.
Best bet is to carefully go through your engine bay and try to find parts that need replacing (e.g. rubber hoses).
for your power steering issue, best bet is to pull off the pump (not that hard, you can buy basic tools from Supercheap et. al. to remove it) and then inspect/get it rebuilt.
*edit* forgot to add, no idea on R34, but my R32 HICAS computer has been playing up since I bought it (10+ years ago), so I just disconnected the small plug to "disable" HICAS but keep my power steering. So something extra for you to look into.