Adjustments, tune up, overhaul.. All the same. I'm sorry I didn't think to use the correct terminology such as overhaul as we know you are the pro! So excuse my terminology. Anyone else like to give an answer without a snooty answer. Geez.
What a nice welcome.
Don't feel bad, he considers everyone else here "home tinkerer's" and is not shy about saying it. I just ignore that sort of thing, it's common to the internet, and kind of amusing.
On the other hand, he isn't entirely wrong. The record player will likely need a pretty serious cleaning, relubrication, and careful reassembly and adjustment to work at its best, and the electronics should probably be reworked to some extend for long-term reliable operations. Turntables are the worst, with lots of mechanical bits that tend to be unique and thus it's very difficult to find replacement parts. Most electronic parts are easy to find.
As a far as value, it's not very valuable. Maybe $100 if you find the right person in the right place, but many times these sets wind up in a dumpster since they can be hard to give away. That's says nothing about whatever sentimental value it might have to you, which no one else can judge.
If you want to pursue restoration, this is definitely the right place to come, the collective knowledge of the people here is just astonishing. Might have to put up with a curmudgeon or two, that happens when the average age is ~60...