Answer:
I cost no money to use, or conscious effort to take part of. And as far as you can see, there is nothing to me. But without me, you are dead.
I am always in front of you, but you will never see me. What am I?
What is it that has four legs, one head, and a foot?
A warrior amongst the flowers, he bears a thrusting sword. He uses it whenever he must, to defend his golden hoard.
In the night a mountain, in the morning a meadow.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?