Do only what needs to be done for it to be safe on the road. If you arent getting backlash and feeling loose around turns then your ball joints should be fine. Same goes for the shocks and struts. Reason being, youre going to be spending and fixing a lot to keep her on the road, no need to overspend when you know youll need to spend more in the future on who-knows-what.
If the bushings in your control arms are shot then buying a complete control arm could be easier if you dont have the tools to change just the bushings. If you DO want to change them, id suggest ordering a bushing set for the whole car and change them out as you need/want.
Start using penetrating oil before removing bolts.
Youll probably want to check the fluid in your diff.
Its possible to get balljoints out without damaging them, but its good to have a couple on standby in case you do.
Loosen the nut to the ball joint, use a 2 lb hammer to take a couple of whacks at the knuckle by where the balljoint attaches, spray it with penetrating oil but dont get it under the balljoint boot, then set the nut flush with the top of the balljoint post and use one these ball joint seperators to pop it off:
You can sometimes turn that tool upside down and press balljoints in with it. Dont bother with a pickle fork, they do nothing but destroy ball joint boots.
Its a little weird your caliper bolts are broken in the knuckles since those holes arent threaded. You should be able to use penetrating oil then the balljoint seperator with an undersized socket to press the piece of bolt out.