Answer:
I run smoother than any rhyme I love to fall but cannot climb.
I can be found after you remove 6 letters from BSAINXLEATNTEARS
What can you catch but not throw?
I have three eyes and only one leg. Obey me or you will be sorry.
I am the building with the most number of stories.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.