Land Registry registration fees vary depending on the purchase price of the property.
The Land Registry provides a calculator in order to calculate the fees on the transfer of land which can be found at https://www.land.vic.gov.au/land-registration/fees-guides-and-forms/transfer-of-land-fees-calculator
In addition to the registration fee on the transfer of land, you will need to pay a registration fee on any mortgage that you will be taking out with your bank, together with a registration fee for any discharge of mortgage that the Vendor needs to arrange at settlement. You should note that the Vendor will allow you that amount by way of adjustment at settlement.
You will also need to pay a fee to PEXA (the electronic settlement platform) for your settlement, which will vary depending on how many titles there are to the property.
Stamp duty is additional to these fees and is calculated on the price you have paid for the property, and you may be entitled to a concession or full exemption, depending upon your circumstances.
On top of that are conveyancer fees. See Casa Conveyancing’s pricing here.