[@Dankman]first question:
What manner of construction are they using?  Do they live in pressurized buildings, with each one being the independent from the others?  If so do they have connecting corridors to form pressurized hallways or do we need to go outside to go to someone else's home?  Alternatively, we could live in a pressurized crater, possibly paraterraformed, or in lava tubes or caves.

Second question:
Would there be outposts, possibly with a different form of habitat, where people could live away from the city but near enough to trade?

I'm thinking of "Take on Mars" and various Mars themed RPs I wrote when I read this, so I just want to get the basics of the universe down.