Answer:
I plow and plow, but never sow. What am I?
I am free the first time and the second time, but the third time is going to cost you money. What am I?
If I drink I die. If I eat I am fine. What am I?
You buy me to eat, but never eat me. What am I?
You hear me speak, for I have a hard tongue. But I cannot breathe, for I have not a lung. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?