How do you get info on an original iPhone owner to contact them?

In answer to your question about the original owner:

If the owner is unknown and has not provided contact information as a message showing in the login screen, there is no way to contact the owner unless the person who gave you the device knows them.

Never purchase from a stranger because it could possibly be stolen and no one has the ability to override the security measures.

Apple values your privacy and has safeguards in place to ensure that no one can access the device.

You will need to reach out to the owner because it is the owner’s responsibility to properly erase the device before selling it.

Until then, it is locked. 🔐