In the US it is normally Mr. and Mrs.
Mr and Mrs is correct or Mrs and Mr is correct
Mr. and Mrs. David Mielke III
No, it is Dr. and Mrs. Ramesh
It should be Mr. and Mrs. Smith's house.
In English, either order is acceptable, but Mr. and Mrs. Jones is the more commonly used order.
You would say the male title first, but you need and in there. It should be Mr. and Mrs. John, and Mr. needs a period.
Burchfield, Walter (name of spouse if you have it) or Mr. & Mrs.
No, there is no space after "Mr or Mrs" and before their last name. The correct format is "Mr. Smith" or "Mrs. Jones."
Dear Dr. & Mrs. Smith
Mr and Mrs
If it's a reply to a wedding intivation, one traditionally writes in longhand, with these line breaks (I hope they come thru) Mr. and Mrs. Jones accept with pleasure the kind invitation of Mr. and Mrs. Smith To decline an invitation, Mr. and Mrs. Jones regret exceedingly the kind invitation of Mr. and Mrs. Smith.
Mr. and Mrs. (ex. "Hello, Mr. and Mrs. Evans" instead of "Hello, Mrs. and Mr. Evans")