International ID card is not important, as you will have your passport.
International Driving License is handy in some states, whereas you can drive with foreign license (not international) in other states (license must be in English or a translation is required). Here is what
Australia law says (you'll find links to state law in this link)
Most of the states allow to use foreign license for maximum 3 months if you are a permanent resident or citizen of Australia (temporary visitors can drive indefinitely). For example
here is what NSW says
I guess one of the very important thing is the housing. Unless you already have an arrangement here, you should better look for the options - initially a temporary thing until you have a permanent lease. Renting a house in Australia is not very straight forward, as owners usually makes lots of checking (job status, bank balance etc) through agents. Some people prefer shared housing, which are ofcourse easier to get as no agency is involved. You can start with
www.allhomes.com.au if you want to rent, or
www.airbnb.com.au for temporary abode.
If you are planning to land in May-Sep, wear heavy clothing as nights can be very chilly in several states.
Australia is pretty much expensive, so you can bring enough clothing if you want. You can bring few necessary utensils, but at the end you have to rely on local buying if you plan to stay on the long run. Bringing things from abroad is ofcourse economically efficient, but I guess some people just overdo resulting a major mental stress. So, my advice, don't take a stress about it, just bring whatever your luggage permits.
Australian customs are very much strict about foods/seeds etc. for obvious health issues. So, my advice, forget about bringing your home's flavor if you want to avoid hassle in the airport. Every time I go through the airports, I see some people just bring foods like they wont't survive without those, and I never understood that philosophy.
About cash, well it depends on what is your planning. If you plan to rent a house, it's around $300 for a 2 bedroom apartments if you go far from city center (and you should, because transport is very easy). Again it depends on which state you are planning to move (check allhomes link I gave above). And usually you need to give 4 weeks equivalent rent as bond money. I guess $6000 as
@Rakshanda suggests is minimum if you have a family and have plan to rent a house.