Gauges dead

[Overdrive]

Usually erratic electrical behavior points to the ignition switch (not so much the section where you insert the key, but the lower portion that is in the footwell), and it can't hurt to replace it unless you've done so recently. If you never have, you might as well. It's a part that's less than $20, and it's a bit uncomfortable to get under there to change, but it can be done with just a jeweler screwdriver. If it doesn't solve the problem, consider it some inexpensive preventative maintenance.

Power cycle the battery, but also make sure you let it get fully charged before attempting a start. Also check your ground points on the car, and the main ground strap on the alternator. If any of these are corroded/loose/broken/missing, you could very likely have your culprit or a piece of the overall problem. Since the car has been sitting for a while, it's possible that some critters may have been trying to snack on the electrical parts.