My 01 SR5 has the stock coils, stock shock absorbers in the front and KYB gas adjust in the rear. The coils are 20+ years old and It's starting to feel like a rough ride. After doing some research, at least to me no one seems to sell a simple front and rear pairs/kit. I keep seeing Highlander rear springs, Bilstein shocks, this part for the front etc......

I don't want a lift, 1'2 and inch or 3/4 I can do. No 2-3 inch lift. I just want a smoother daily driver. Budget is important to me, so inexpensive the better as I'll have to pay someone to do the work.

I have a brand new 2022 Tacoma front and rear suspension sitting in my garage which I know won't work, I'm uncertain if they have any trade vaule for 4runner parts?

Again, in my prefect world I'd like minimun lift, or nothing to obnoxoius. I don't need all that clearance. Soft ride for a daily driver.

Naive question also, do springs eventually wear out or is that more of a shock absorber thing?