You can't add your mother to your application:
https://www.border.gov.au/Migrationagents/Pages/member-of-family-unit.aspx
If you did mistakenly add her to your application, DIBP will ask you to withdraw her from the application, or they will refuse the whole application.
To apply for a Parent Visa, you need to have 2 years residence in Australia AND you mother needs to meet the "Balance of Family" test, which means she would need 2 of her for children to be living in Australia permanently.
There should be a new Temporary Parent Visa being introduced at the end of the year. However, this is for a maximum of 5 years, extendable to 10 years but not renewable after that, (so she'd have to leave then, or get another visa) and you need to be an Australian Permanent Resident for 4 years before you could be her sponsor for this visa anyway. There are some serious issues to consider with this option anyway :
http://www.expatforum.com/expats/au...5098-tbc-temporary-sponsored-parent-visa.html
Otherwise the only visa possible would be a Visitor Visa - normally the maximum duration for these is 12 months in an 18 month period so you can't stay permanently, need Private Health Insurance, and you can't assume automatic renewal time after time with these as they are not designed for permanent residence.