So we basically get everything that has "required" in brackets after it?
Do we need this-
Mosby's medical, nursing & health profession's dictionary,
(latest edition), Australian and New Zealand edition,
Mosby/Elsevier, Marrickville N.S.W. ?
Sorry for being a noob 
I wouldn't bother with Mosby's. Never used it for anything. When unsure of medical terms, consult your best friend: Google.
Don't go buying everything just yet. The brackets are a lie.
What you should invest in for sure is the APF (Aus. Pharmaceutical Formulary) since you'll be using it all four years and intern year if it doesn't go out of date. You can only get it from PSA which is a floor above student services on campus. It doesn't matter if you get an older edition during uni.
The AMH (Aus. Medicines Handbook) is also very useful. There's an online version of it, but if you prefer to tab your books like me I'd buy it down the track. It updates every year though, but you don't need to update till intern year (2015 for you guys).
Physiology - you get three picks. Vanders is comprehensive, Silverthorn has good layout and Fox is shit (except for the ear section). You don't have to buy one but this is the 'biology' heavy unit so it'll be good to have extra reference. Of course you can borrow but near exam time everyone wants it.
Organic chemistry - Brown and Poon's intro to Organic Chem is important if your lecturer is shit. Get it second hand. Not worth the usage for a new one. Thankfully the lecturer changed after my year so you might not have to rely on this book so much now. I'd get it if chem isn't your forte.
Physicochem - I have Atkins but never used it. If you get Yuriev which I'm sure you will, her lecture notes are the most comprehensive you'll ever see.
Don't worry much about second sem books yet.
Don't be sorry, good news is you're only a noob once.