I'm in the process of buying a house it has a enclosed breeze way that only has a storm door. I want to put a entry locking door their along with the storm door it does that have a door frame on it how do I go about doing this?

You have 2 ways. If the opening is already framed with a standard finished opening, buy a slab door and fit it. Otherwise, buy a complete door with jamb and sill and fit it. Exterior doors are 36" and 32".You Tube has lots of door videos.

If using a slab door it should be solid core with three hinges. It might be easier to install a totally new set up prehung. The rough opening should be 1 inch larger then the prehung unit.

Chuck