I'm not sure what your definition of "restore" is, but I'd just get it working and clean it up as best you could. I wouldn't clear the playfield or repaint the cabinet.

Doesn't work may mean bad fuse or no credits on the machine, who knows. I've never run across an EM that I couldn't get to work (as long as everything is there).

As far as getting the game going, it has all the same things inside that all EMs have...steppers, relays, score reels, score motors, etc. The game specific parts are going to be harder to find than a Willams, Bally or Gottlieb. Fortunately most of the time you don't need any specific parts. Generally cleaning and adjusting contacts is all that's needed. Parts like new rubber rings and bulbs is all you may need to have as far as parts are concerned.

Now, I only have one CC pinball game and I will tell you that the score reels are about the finickiest things I've ever worked on. They are super simple in design, but so hard to get to work right. They used a printed circuit board with traces that several wiper fingers ride along. The problem is the wipers put too much drag on the entire score reel. You have to make sure the traces are clean, lightly lubed and that the wipers have the right amount of tension on them. Too much tension and the score reel doesn't move correctly. Too little tension and it wont zero out when resetting or advance the next score reel when it reaches 0. So be prepared to spend time cleaning and adjusting them quite a few times.

From my 10+ years in the hobby and owning a good many Chicago Coin machines I will tell you the most typical problem on them is broken armatures on the large relays that are mounted between the score reels. Those armatures are pretty much impossible to find so you have to repair the old ones with epoxy if parts are not missing. After that - as said above - the score reels themselves can be a PITA to fix.

CC also had a few other "funky things" they did so they are not my first choice when buying machines. If you are handy and can grab it for something under maybe $100 to $150 it wouldn't be a bad buy. But if you get frustrated easy and don't like a challenge pass it by and purchase a Bally, Williams or Gottlieb sometime down the road instead.

If you had to drive 2 hours one way to look at it I think you made the right choice.
I have owned several CC pins over the years.
I like them but parts are tough to get and there really is not much of a resale value here in New England.
I currently own a Sound Stage.