1)
The speaker uses old people's dialect.
a)
年じゃで = 年なので
b)
二時だった
2)
It works as a rhetorical question, thus, that sentence actually is a negative imperative.
いつまでメソメソしてるんだ = いつまでもメソメソしてるんじゃない(=メソメソするな)
3)
The subject(structure, house, room or like that) is 間口が広い, and similarly 奥行きが深い, too. (The two もs are for emphasis.)