Rod is right. Generally you’ll have around about 3 to 6 metres setback for buildings from road frontage in suburban areas under Council planning requirements - but this differs from Council to Council, and I only have experience in South East Queensland. Not all of that will be reserve. Urban areas you tend to get less (0-3?).
The only way to definitively tell is to to get a survey done to determine the exact boundaries of the property. You can get a copy of the current registered plan for the lot, but this may not be of great assistance depending on its age - because markers can shift over time due to land movement, especially if they’re based on pegs (which are often moved or pushed around during construction). Newer plans use GPS coordinates and are therefore more accurate, but unless you’re in a new subdivision the chances of that are fairly slim.
Sometimes the front of the fence line/placement of the letterbox can give an indication but it’s unreliable.
So, if you want something general, get your relevant plan and measure it out. If you want accuracy, get a survey done.
In terms of ‘vehicular crossing’ (i.e. driveways), councils will generally have a local law under the Local Government Act which sets out what they can require owners to do - such as construct and maintain to a required standard. For example, this is covered for Gold Coast in Local Law 11, at section 10. For mowing, that’s a little more difficult. Councils often have policies setting out that owners are responsible for mowing nature strips, but they’re often not a lawful requirement. However, commentary indicates that the cost of rates s calculated on the basis that owners do mow their nature strip- and if they don’t do so their rates may increase or they receive a bill for the cost of Council maintaining it.