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.
Has feathers but can't fly. Rests on legs but can't walk.
Blend a teapot shot so the pearlies won’t rot!
It is by nature, soft as silk; A puffy cloud, white as milk; Snow tops this tropical crop; The dirtiest part of a mop
He has one and a person has two. A citizen has three. And a human being has four. A personality has five. And an inhabitant of earth has six.
I’m grown from darkness but shine with a pale light. Very round I am and always a lady's delight.