The FTP Hostname will be ftp.yourdomain.com.au (once the domain name has propagated through the global dns system. This may take up to 48 hours after registering your domain) . 


The username and password were emailed to you after you registered the hosting account, and are the same as your cPanel username and password.


Within the first 48 hours (or until the domain name has propagated through the global dns system) you can use the temporary address provided to you in your welcome email instead of ftp.yourdomainname.com.au