The 36 in. x 80 in. Colonist Primed Right-Hand Molded Composite MDF Single Prehung Interior Door weighs roughly 74 pounds. Thank you for letting us assist you today.
The frame extends below the bottom of the actual door and the door can be trimmed. I think you can easily get the 2.5" off.
The door does not come with a handle. So to make it lock you just need to purchase a locking handle.