A baronet is addressed as "Sir", and his wife as "Lady". Exactly how to address the envelope is a little dicey , but "Sir John Doe and Lady Doe" would be acceptable, I would think.
baroness
Doctor.
I believe the correct address is 'Your Worship'.
Lahore
For American Consul Generals, the proper form for the addressee is The Honorable First Name Last Name. The proper salutation, however, is Dear Mr. (or Ms. or Mrs.) Last Name.
As Lt. Governor.
Chili Rings, Buttholes, Brown Eyes... you get the point
Ms. and then your last name.
Honorable __________ (Insert Supervisor's Name here)
Mr. or Madam President.
"My Lord" or "Your Lordship" are both acceptable.
Call him Dr. unless he tells you differently.