There is no simple answer. It will depend on the exact model and when it was made. Best to call S&W to get a correct and current answer.
NO
You can, but, you should not. The frame is not rated for +P
Contact S&W.
9mm parabellum
1. It can, but, it is not advised. 2. It is stated by Smith and Wesson that the model 14-3, which is the third change of the model 14 can safely shoot plus P ammunition.
Contact S&W.
9mm
Be aware! Never fire ammunition in a weapon not chambered for it! Stick to the .45 colt ammo.
The current production Ladysmith (by Smith and Wesson) fires .38 Special ammo, and can use any factory .38 Special ammo. Do not confuse the current Ladysmith with a tiny .22 caliber revolver made by S&W years ago.
Yes.
No
Check with a local gun shop.