We import most of our shows from the US or UK, so you'll mostly find that there aren't many Australian TV shows apart from games, reality and news shows (apparently Australian soap operas are more popular in England than they are in Australia).
Here's a list of Australian shows:
-Underbelly (a show about the Australian underworld - based on trye events; this should not be confused with the American or Kiwi series that followed the Australian one)
-The Chaser's War on Everything (a political comedy; they make fun of everyone and everything (both political parties, various politicians, businesses and countriew); it's hilarious, but they sometimes step too far over the line, which eventually got them cancelled; all episodes can be found on Youtube)
-The Block (reality TV show; from Wikipedia: "The series follows four or, more recently, five couples as they compete against each other to renovate houses and sell them at auction for the highest price")
-Home and Away (soap opera)*
-Neighbours (soap opera)*
-Kath and Kim (a comedy series)*
*Largely exported overseas
We also have lots of game and reality shows that are based off of foreign (mostly American) ones, often with the same name e.g. The Biggest Loser, Australian Idol, Big Brother, Masterchef, Australia's Got Talent, Wheel of Fortune, Deal or No Deal, Who Wants to be a Millionaire? etc.