I would not start the car until rubber fuel hoses are replaced, fuel tank drained , cylinders oiled, cranked with plugs out / ignition disabled to get oil pressure , throttle returns to idle. Have a non powder fire extinguisher ready and a powder one if the first one can't knock things down. I would not be to concerned with changing the oil as long as it is not milky.

A lot of damage can be done to an engine that has been sitting if it is just started up without preparation.

From the looks of it, I doubt it was ever driven in salt.