It is very common to reuse the springs & tophats - dont usually need to replace those items unless something is broken, and that would (should) be pretty obvious when you take them out of the car.
You can jack it up, take the wheels off and inspect the springs for any obvious damage, but chances are they are fine. Make sure you swap over the rubber sping seat cushions as well.
You will probably want to take the car in for an alignment when you are done - you can get it pretty close by marking the positions of the 2 lower bolts (at the hub) - one is cammed (upper, i think) and controls camber setting - but for proper tire wear, I would have it done right.
One last thing to note - do not overtighten the tophat bolts when reinstalling - they dont need much torque (around 14-15 ft/lbs) and will break if overtorqued.
here is a suspension diagram for a 95 Legacy.