It's located right next to the Vivian Beaumont theatre. The hours vary, MOndays and Thursdays it's open from 12-8, Tuesdays, Wednesdays and Fridays it's open from 11-6 and Saturdays it's open from 10-6. You need money to make the copies, though not necessarily a library card. I think you need to get a "Copy Card" which can be obtained at the library.
In the future, all of this information (and more) can be found on the website. Just google Lincoln Center Library.
"Sing the words, Patti!!!!" Stephen Sondheim to Patti LuPone.