Ohhhh yer, if you are renting to start off with then you will be entitled to rent assistance as well as child benefits. :-)
raa cover depends on what level you are after, but it's not huge. I think around $130 per year.
Ambulance cover for a couple is about $90 a year, but it's worth having as they can send you broke.
Some people opt for health insurance. Personally I don't think it's worth it. Even with Medicare you are likely to have some out of pocket costs with drs visits. I use a bulk billing dr so have no direct costs for most things, but they can be hard to find. Prescriptions are not a set amount here either. For an example of the kind of costs, four months of the pill costs about $20.