1) There is a list somewhere, probably written by Beech. In practice, none. Who else uses them?
2)You're yawing. If you were yawing wings level the nose would be off to one side. Roll on bank, as in a sideslip, and the nose goes up.
3)Secondary efect of rudder is roll. Use with care. Coarse use of rudder near the stall can cause autorotation. Some aircraft maintain roll control by aileron deep into the stall, all aitcraft vary but in general at the incipient spin stage use rudder as an anti-spin control to stop the wing going down while you reduce alpha. Be very, very careful with swept wings at the stall, Rudder can wipe you out.
4)Elliptical straight wings have minimum induced drag.Swept wings have a high induced drag. This gets worse as alpha rises. Nose high approach on a swept aircraft is really draggy.