NEW STRINGS AND CABLES!! Don’t even pull it back till you do this. Take it to a reputable archery shop and have them look it over .
If it’s worth keeping, then D loop, speciality archery podium peep with clarifier/ verifier depending on your eyes .
Decent arrow rest.
Modern fiber optic sight.
Trigger release.
This will probably be a “gateway” bow for you, after a couple 3D shoots you will probably upgrade to a more modern bow so all my recommended parts can transfer to a new bow ,which at that point you will hav a complete modern rig.