u/ChessePizza881

Hi everyone, I’m a Moroccan student applying for an Italian student visal and my brother, who lives in Canada, is my financial sponsor.
His documents include:
• Bank statements (last 6 months)
• employment letter
• Tax returns
• Sponsorship/affidavit letter (notarized)
• Payslip
is there anything else?
My questions:
1. Which of these actually need an apostille?
2. Do bank statements and income proof need any special authentication, or are originals enough!!?