newtuneup ..engine wont 'turn ove'r.has motor has locked from sitting?.easy fix?

Engine's don't "rust" internally due to sitting. If the vehicle has sat for 3 years, there could be so many possible causes to it not cranking over. Sure, ensure the engine turns with a breaker bar, but also check the starting system. Battery? Cables? Starter motor? Fuses? Ignition? www.repairpal.com/repair-shops