Birth certificates of your parents are only needed if you are sponsoring your grandparents
3 Year NOAs are only required if you do not provide yours and your Co-signer's SIN on the financial evaluation form
IMM008 DEP is only needed if you have more than 5 dependents
If your brother is not a dependent, then he doesn't need to fill anything (that's my understanding). You will need to mention him on the Additional Family Info form for your parents, that's about it
I don't see where it asks for a copy of the Sponsor's passport where it shows Father's name ?
Total fee to sponsor Mother and Father will be $2080, if you choose to pay RPRF upfront. You have the option of paying RPRF later, but IRCC cautions to pay it upfront to avoid "delays". If you choose to pay it later, then total will be $1100 ($550x2).