How to start car with no key?

Cannot tell. My guess would be "OK" You need to rotate the crank one turn and line them up with a ruler by the centers of the shaft, the crank dot at 12 o'clock and the cam at 6 o'clock. Be sure to take care to look with your eyeball "straight in" at the sprockets.

Once again, this will put no6 ready to fire.

My guess? Since this is an all-metal cam drive, they are OK. That engine looks AWFULLY gummed up. I'd bet it's about ready for an overhaul.

Did you ever run a compression check?