In some circles the traditional form "Professor and Mrs David Wilkinson" is acceptable; but social change has made "Professor David and Mrs Mary Wilkinson" the widely preferred form.
Doctor.
No. College is a noun, also used as an adjunct or adjective (e.g. college freshmen, college professor). There is an adverb form with possible connotations, which is collegiately.
I believe the correct address is 'Your Worship'.
Lahore
The proper salutation for a doctor is doctor or professor depending on their title. In writing the short form can be used which will be Dr. or Prof.
The proper form of address to a Consul General is "Consul General [Last Name]." It is respectful to address them with their title followed by their last name when speaking or writing to them.
As Lt. Governor.
The possessive form of "professor" is "professor's."
Ms. and then your last name.
"My Lord" or "Your Lordship" are both acceptable.
Mr. or Madam President.