Hai aspirant! you have asked 5 questions totally. Let me help you out!

1) yes. surely you can start applying for IBPS exam with no doubts.

2)Usually IBPS registrations will fall on AUGUEST month.

3) documents like Call letter along with a photocopyof the candidate ,photo identity, PAN card,Passport,driving licence,voter's card,bank passbook with photograph.

4)Fee structure :Rs-100/ for sc/st