http://www.8notes.com/school/scores/recorder/bach_french_suite.gif

In the end of that one, there is some weird 1 and 2. What is that?

Those are the first and second endings. You play through the whole piece, including ending 1. Then you repeat back to measure 17 and when you get to the end again, skip ending 1 and go directly to ending 2, which will finish the piece.

Thank you.