Just start here
https://dps.mn.gov/divisions/dvs/Pages/default.aspxand FYI:
Non-titled Vehicles
What you need to know:
• If the vehicle has been issued a title, the transfer must
take place on the title. If the title has been lost, the
titled owner of the vehicle must obtain a duplicate
title.
• If the vehicle has never been titled, the Minnesota
registration card is acceptable proof of ownership.
• A foreign state registration card is not acceptable proof
of ownership, even if the state that issued it does not
issue a title to that particular type or model year
vehicle. Please refer to “No Proof of Ownership” in
sidebar.