Most of the products you name do not exist.
1. DC is a version designator. It follows XI, X, 9, 8...
2. There is a free product variously called Adobe Reader and Acrobat Reader. Current version is Acrobat Reader DC.
3. There are commercial products Acrobat Standard and Acrobat Pro/Professional. Current versions include Acrobat Pro DC.
4. There is no product called Adobe Professional. There is no product called Adobe DC.
I have no idea what you mean by "Electronic signature policy on adobe digital signature?" What are you asking?
You ask "Also various settings associated with setting up a password." What sort of password?