I am sponsoring my wife under family category to canada, and I am a Canadiian citizen. I understand that I do not need to meet any financial income requinments as we are married. Is that correct and does that include not need to complete forms imm5481 or form 1283?
You are correct, you do not need to to meet a minimum income.
However you do need to complete IMM 5481 as far as I know. IMM 1283 is for sponsoring dependent children with grandkids, to the best of my knowledge.
I would suggest creating a table of contents for the front of your package. Put everything in an order that makes sense to you and then write out a list (with "page numbers" if possible") and put it on the very front of the group of forms so the officer can use it as reference.