Auto transmission. Been over a decade since I was offered a MT car in AU. Unless hiring a ute/pickup

https://roads-waterways.transport.ns...tor/index.html
https://www.linkt.com.au/using-toll-...welcome/sydney
https://www.linkt.com.au/using-toll-...ator/melbourne
https://www.eastlink.com.au/buy-trip-pass
Can pay after using up to a certain time. If you do not pay at the time, the rental car company will add a large fee later. The rental car operator should explain tolls to you.

Edit
Hertz. Others will be the same
https://www.hertz.com.au/rentacar/pr...0New%20Zealand
https://www.hertz.com.au/rentacar/mi...u_toll_faq.jsp