If everything was for free, would we have run out of anything?

Clever question. You'd abolish the idea of money overnight. People would consequently stop working and the only means of staying alive would to grow your own food. Who would go to work, earn nothing, and come home to an empty larder while everyone else is working the fields to keep themselves alive?

Eventually people growing specific crops and keeping various animals would meet to barter. This would turn to markets. Money would be invented again, and we'd be back where are now.