My family (me, wife, 3 kids) has a car and a people carrier (aka "minivan" over here). It's much cheaper to run a car over here.
Whenever and where ever possible I'll cycle, run or walk to go somewhere -though I do think I'm viewed rather strangely at times for this in the land of drive thru's (c'mon, why leave your car when you don't have to?). Yes, I've seen people drive less than a 100m to get a cup of coffee -seriously.
I'll half commute into work most of the year, but stop when it gets to be too dark on the way home, or if there is ice or snow around. The older I get, the less I like automobiles -they really are the cause of so many deaths, pollution and rage incidents. Having said that, they are a necessary evil (not a lot of public transport where I am even though I'm in the commuter belt of Boston, and they allow me to take my family on vacation!) and I also appreciate they have opened up people's lives and saved them as well -I just think western culture has gone a little crazy on them to the detriment of our society.