We've been in ours nearly 12months.
In NSW watertank is mandatory and must be connected to toilets. You also need a basix report and epending on a lot of environmental factors yo may need special lighting/insulation etc to make sure it all complies. You must also have a clothesline installed inside and out. Otherwise the house won't be passed.
An estimate of our costs were
Carpet $5K - included though
Fences - $4K
R/C AC - $12K
Garden $3-5K
Drive/paths/patio - $15K This was at mates rates too. The others were much dearer
Window treatments $5K

So no tiles etc are included? Ours were as long as the styles we picked are in a certain pricerange. We paid extra.
I know you loved the disply home and builder but shop around as some will have waaay more stuff included. eg mine came with a 900mm oven as standard.
Some builders don't even put 2 courses of bricks over the windows. They either put the windows higher and stop the wall at the top or use weatherboard. That was something I didn't like about some builders. They charged extra for more bricks.