iPhone Locked To Owner Without Apple ID and Passcode

You do not. This is Apple's theft deterrent to prevent use of your device if it is stolen. If you could bypass that, then it would defeat the purpose and anyone would be able to steal a phone and remove the lock. If the phone is your phone and you purchased it from Apple or Authorized Apple Seller, then you can use this link to remove the lock. You will need your purchase receipt showing your name and serial number of the device. Apple does not get involved with third party sales.

How to remove Activation Lock - Apple Support