Eek. Here's what I see.
Your tube is most likely shot. Free floating pins means there's no way you'll ever get the neck board plugged back into the tube properly. At best you might get a working picture, but you'll lose colors as the pins finally break off, or the whole picture altogether if the focus/heater/ground pins are broke. More than likely attempting to plug the neckboard in at this point will cause more damage than good.
You need to find a donor TV for that chassis. Luckily you have a pretty common chassis for that monitor setup, a Wells Gardner 25" K7000 (or K7xxx variety. So as long as you find a 25" color TV with a 10 pin neck tube, you should have a match and you probably won't even need to swap the yoke.
Be aware, the knobs on your flyback are white - those white knobbed flybacks have high failure rates. Nothing to worry about now, but be aware of it. More savvy monitor folks don't like to see those white knob flybacks.
Really, someone mounted the chassis to a piece of breadboard?? Cripes, that cab IS jacked up.
I say pull the chassis, pull the boards, pull the JAMMA wiring, pull all the controls, coin coors, power supplies and transformers. Take anything not bolted down. Part out the whole thing, sell the empty shell to some other poor sap who wants an empty cab (leave the necked tube in it for him to deal with) and try to recoup your investment by selling the parts. Or you could try to find another 25" cabinet with a non-working monitor for sale somewhere. Most of them are JAMMA cabs anyway, so you could just plug in your board and swap in your monitor boards and you'd be good to go. You could pick up a non-working 25" cab for under $100 and re-sell it for $250 when it's working. That would get your money back.
Sorry to be the bearer of bad news, but you likely toasted the tube when you were driving home with it, or when you were loading/unloading it.