They make overlays for the play field but without the full game I would scrap it and take the parts off. Join the Baby Pac man club here on pinside and ask.

I'd save it all, like suggested you can add an overlay on the PF itself. CPR made a small run of replacements as well. That way if/when you find a game, you'll have a descent playfield to put in. Would be difficult to make a stand alone, parts alone would cost you near the same as a whole game (not including the cab). The vidiot board itself usually cost 200 bucks or more.

No. That playfield is garbage. Looks water damaged too. Rocketland Coin-op has literally a dozen extra Baby Pac-Man playfields from fair to excellent condition. They were selling for $75-$150.
You’re missing the other half of the plastics, and my guess would be that machine was severely water damaged long ago, so it’s sad that a BPM was destroyed, but not much was lost. You should still be able to find a complete game, 90% of the time they don’t work (Vidiot board failed or RAM went bad), and they’re usually under 1k.

It cannot be stand-alone. It would need new code.
The monitor is almost IMPOSSIBLE to source. If you had that you’d be in the money for sure.

Wall hanger for now. There’s a guy on here also trying to make Baby Pac-Man a stand-alone mini-pin, you’ll need to figure out a method to display the score since everything was done via the monitor.