Can my defacto claim me as a dependent if I'm not working?

Answer 1

Generally is you meet the criteria of a "dependant" then yes, of course income of the dependant (Separate Net Income)is taken into account and this does include exempt income and welfare payments etc. Take a look at the ATO website for more info;
www.ato.gov.au
the "what you can claim" link then offsets & rebates should get you to the relevant info.