Do you run on the third strike if first base is not occupied?

Answer 1

With 0 or 1 outs, the batter is automatically out. With 2 outs, the batter may attempt to reach first base safely.

In order to be called out automatically, first base must be occupied by a baserunner.

Answer 2

If the catcher doesnt cleaning catch the 3rd strike (it hits the dirt), then you can run to 1st, the catcher will have to tag or throw to 1st to get you out.

This rule applies if there are less then 2 outs and 1st base is not occupied, if there are 2 outs, then you can run even if 1st base is occupied

Answer 3

If less than 2 outs the batter would be out because 1st base is occupied. If 2 outs then the batter and runners can advance. The catcher or fielder must make the out by retrieving the dropped ball at which point they can tag home, tag the batter or throw the ball to first to make the put out.