You’ll be fine with that salary and should be able to rent a one bedroom. Rents are too damn high, but you won’t need roommates if that’s your combined salary. Tufts is a fine place to do residency Unless you are focusing on pediatric care

obviously it depends on other financial obligations; but yes, 2 people living in a 1/2 bedroom will be ok.

Depends on debt and such, but assuming you get to keep everything aside from taxes and retirement savings you'll be able to find something. But you won't be living in luxury towers in downtown Boston on that. You'll be looking for places in Jamaica Plain or Malden on the orange line.