Came OEM as a 2x5 friction, and not in the class of the European bikes of the era, for the most part.
Depends on what you want to do with it, but cables/housing, hoods will set you back $20.
If you have to pay someone to repack the hubs/headset/bb, probably not worth it in the long run.

However, if you like doing that, de-rust it, tune it up, and it's a fine commuter and entry level bike.
Just be wary about getting over the $50 range on expenses, unless you simply like the bike and the hobby.