A family of Microsoft word processing software products for creating web, email, and print documents.
Re your #4: Not just "add-ons for Word", but any OS X utilities/apps
Re your #6: Not a new Office Identity, a new User Account on your Mac. Testing in a new User Account is a standard OS X troubleshooting practice which helps identify possible sources of issues.
Re your #7: Do not delete your present Normal.dotm, just rename it & move it to a different folder or to the Desktop. [I wouldn't do that just yet, but note that no Office programs should be running when you do.] Do you mean that you've assigned keyboard shortcuts to Macros you've recorded? If so, macros can be copied from one template to another using Word's Organizer feature. Kybd shortcuts assigned to macros remain assigned. Other kybd customization cannot be retained.
It might be helpful to know more about this... especially if you had other versions of Office (2008? 2004?) installed on the same Mac.