i would recommend you contact the USYD faculty directly as I don't think the UAI cut-offs change much between main round and late round so you may be sitting around and waiting for an offer that may never come.
Aeronautical/ Commerce starts in first year. Many subject like MATHS and COMPUTING are common but you would also be doing ACCOUNTING for the Commerce part and AEROSPACE DESIGN for the Aeronautical part.
as for there being a standard program for this .... I don't think I've seen one.
If you...
yea UNSW and USYD look OK. I went to the USYD open day and had a go on the flight sim. This looks more interesting to me, but I'm more practical and hate accounting.