I agree that insurance is the killer. My H and I pay 50 or thereabouts each to insure 2 cars - so 100 a month.
On top of that, we put 150 per month into an account for maintenance (MOT) / road tax / breakdown recovery. That just about covers 2 cars over the year. We are just about in credit!
Then there is the fuel - H probably spends about 25 a week - so 100 over the month. He has a 20 mile round trip per day. Then thats the car we use at weekends etc.
I do a 120 mile round trip 4 days per week. I use over 60 a week, so maybe 250 a month.
Then there is the loan that we have to pay for the cars. 200 a month. One is a 2007 car, one is a 2010 car, so neither particularly new. I think they were 8,500 or thereabouts for both (bought at different times).
So whats that - 800 a month. Obviously a large chunk of that is the cost of the cars and my commuting costs, but even without that, its expensive.
If we could do without cars, even just survive on 1 car, it would be miles better.
Seriously, tell everyone who thinks you're mad that you're not. You absolutely don't need a car simply because you have a baby now.