That's an interesting TV. Hard to tell exactly from the photo, but it looks like the tuner might use air variable capacitors, similar to what you'd find in a "boatanchor" communications receiver. I have only a couple of TVs with that type of tuner. (It looks like your tuner might also be missing a side panel; they are often enclosed in metal for shielding.)
Your cabinet is finished in lacquer, not varnish. I would try to "revive" the finish rather than strip or sand it down to bare wood. In short, touch up the worst spots and then apply some new lacquer. If you strip it, you will lose all of the decals around the front controls, which could be hard to replace.
For mold, I'd start by scrubbing out the inside of the cabinet with some hot soapy water, maybe with a little bleach to keep it from coming back. Dry thoroughly. Mold should not be a big problem in the future if you clean it carefully now and then keep it in a dry environment after restoration. The heat of normal operation will also help keep it dry.
Regards,
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html