Communism will always be violent, page-168

Marx's Capital is more relevant to today that it was when he wrote it. He lays out the laws of motion of capitalism, and these don't change. There cannot be any freedom as you say -

"what if man could get or do anything or something with no pain and no effort ---
the entire 'price' theory gets turned on it's head -- it just doesn't exist anymore."

That's bollocks because the productive capacity already exists to accomplish this, but the surplus value is confiscated by capitalists (also by the state then, for the military industrial complex, look at the assassination of JFK because he was going to withdraw from Vietnam).
Price theory, actually you do have a point there with automation which proves Marx correct yet again. As you say, if there is no labour in the cost of making commodities there cannot be any price - that is the labour theory of value!
But that is feature of capitalist wage labour, there was no price on slave labour in Roman times and we still have a price on land and natural resources. The price is the ransom note.