Q: i for get the pass code of my iphone and the apple ID was not my id so what should i do to get it set up

Two issues

If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support

If you are seeing an Apple ID other than your own - that is the activation lock

If you bought the phone second hand - you will need to contact the original owner and have them do this

What to do before selling or giving away your iPhone, iPad, or iPod touch - Apple Support

If you are the original owner - you need to bring the phone and documents of ownership and proof of identity to an Apple or authorized store and they can help you

Please make a Genius appointment at an Apple Store, or go to another authorized service provider.