Dr. and Mrs. or Dr. and Mr.
You call BOTH of them "Rabbi".
There is no general or standard salutation for an individual with a masters degree, like you would have with a doctorate degree. In other words, Dr. John Smith.
Sir and Ma'am. Or, you refer to them by their rank, as in "Greetings, Colonels Smith."
They can get married in Virginia or any other US State. This was not always true.
It depends on local legislation and the religious views of the couple involved
yes
What tax bracket would a married couple with income of $100,000 and no dependents other than selves fall into?
Yes, providing that the couple meets all the same requirements as any other married couple. The fact that the marriage is same-sex makes no difference.
Yes. Same-sex marriages are legal in Connecticut and married same-sex couples can divorce there, no matter where they were married, providing they meet the same requirements as any other married couple.
Yes. Same-sex marriages are legal in Vermont and married same-sex couples can divorce there, no matter where they were married, providing they meet the same requirements as any other married couple.
Effective June 19, 2015, by ruling of the Texas Supreme Court, same-sex couples married in other states can divorce in Texas. The process is the same as for any other married couple.
Obviously, they love each other, as any couple who wants to get married does.