My B.Com results came last week. What documents should I take when I go for MBA admission now (before getting original certificates)?

You can/should have a provisional certificate from your college from where you pursued you B.Com. You'll have to write an application for the same to your college's head. Good Luck!

you can go with 2set copies of 10th,12th marksheet & certificate,your graduation marksheet copy & passport size photo graph if you did not collect it collect it from you institution or if its not came just consult where you want to admission write a undertaking there that to produce your marksheet