Did you take this test for marks?

http://www.cic.gc.ca/english/immigrate/skilled/assess/index.asp

But even before that, you should take the eligibility test at this link:

http://www.cic.gc.ca/english/immigrate/skilled/tool/index.asp

Regarding the proof of your relationship to your aunt... you have to provide your and aunt's birth-certificates. Since those certificates contain parents names... that may establish your relationship to your aunt (what kind of aunt?). otherwise consider even putting her marriage certificate, if you are related to her husband and so on.. until the relationship is bridged with required documents.