hoses should be fine, post some pics would help. there arent too many different systems, your car should have inverted double flare 45* taper both ends. otherwise new ones from auto parts place (non genuine) should be $40 or less each (ae86 fitment)

caliper should be fine. reserve maintenance for when you rebuild them. reco' kit is cheap and its pretty a pretty easy job.

springs. dont worry about. its on a strut. cant go anywhere really. only a prob really at the rear where it can call out. if youre worried, all youre trying to do is keep them in place, so if the strut uncompressed to the point of the spring being loose, it wont come a drift and seat incorrectly. the way the spring seats are designed, this is rarely an issue unless your springs are very very short and you have very long travel shocks.