66 Gauges dont work, need help!

All of my gauges suddenly stopped working. Well i say all, the amp gauge sits in the middle all the time so im not sure if its working or not. I does seem to dip a little when i start it up.

All the rest are pegged to the left. I pulled my instrument panel and looked around. The voltage regulator seems to be corroded. I checked the conductivity from one post to the other and it showed nothing. Therefore there is no flow from one side to the other. Should there be a flow? If this is bad can i pick one up at a local parts store? Which ones?

Secondly, my fuel gauge never went past half full when it was working. It would get close to half right after i topped off my tank. It is pegged far to the left. Any ideas on fixing this? Maybe i should bend the needle back to the right, as I did repaint the needle and may have bent it to the left.

Last, the temperature gauge (when it worked) used to go from cool to hot right when i turned on the engine. Does the gauge sweep the full distance and go back to its cool resting place on the left? Or do i have a problem there also? It never stays on hot it just sweeps over there and back. It even does it when its cold.

Thanks for the help.