Pics show the plugs in the engine - pull the plugs out, leave them out.
All lube suggestions above are excellent, I've always had good luck with 3 in 1 oil, lots poured down each spark plug hole.
Please confirm this - You have tried to turn the engine BY HAND, front of the engine, with a wrench, when the plugs are out? Nothing worse that frustrating the hell out of yourself only to find the starter is bad. Plus you'll only destroy the starter if the engine actually is stuck.
You are a long, long, long ways away from trying to hotwire this to start.
