I'd get some fresh gas in it, make sure all the fluids are full. I would not change the oil yet. Hook it up to a good battery, if it has clear flood mode use that to build oil pressure by cranking the engine, if not pull the fuse for the fuel pump. Give it a few blasts of starting fluid that has a little top oil in the mix, and fire it up. Once you have it running change the oil and filter. Then take any additional work from there depending on the final plans for the car.