Hey buddies
Hope u all fine

I have to visit Australia in January 2015 for a business meet for a week. Date and place not confirmed. It can be to Sydney or Canberra.
I am making plans to take my family with me for an additional week. I would like to get serious information to which places I should take my family in Australia.

Can you also tell me from where I can book combo hotel and Flight tickets??? Will it be feasible or I should book travel tickets and hotels separately...?

We will be group of 4 so tell me that will the local transport be convenient or I should hire a car over there????
Please mention precise links if possible
thanks in advance