Answer:
Alone I am 24th with a friend I am 20. Another friend and I am unclean.
Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot. All is cool where it is not. What is it?
In Paris but not in France the thinnest of its siblings.
If I drink I die. If I eat I am fine. What am I?
Squeeze me and I cry tears as red as flesh, but my heart is made of stone. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.