Does anyone know if the following combinations work together?

11 speed rear mech + 10 speed shifters?
11 Speed single chain ring + 10 speed chain?
11 see chain on 10 speed cassette?

Need a rear mach and cranks and thinking a partial step in the right direction would help ease the financial transition + keep my wheels running between current bike set ups.

First one no. Second one yes. Third one yes but may be a bit klunky.