There should be a model number on the back panel. I’m guessing it’s a DAC90 or DAC90A It just looked familiar as I’ve been looking at one very similar for the last few weeks.
As to what’s involved in a restoration “it depends”. The DAC90 is a relatively simple radio, so there’s not that much to go wrong. It’s also, however, an AC/DC radio which has a live chassis and a dropper resistor that runs very hot indeed. Restoring it to working order as it was when it left the factory would still leave it some way behind modern standards of electrical safety. That may not be a problem if you’ll be using it under close supervision on an occasional basis. If it’ll be used for long periods of time, and especially in a household with kids, I personally would want to go further than this and improve its safety, which would be more involved.
This isn’t something I do for a living, I just restored this one radio as a favour and out of interest.