We recently purchased a travel trailer and did not receive a title. How do we advise the person who sold it to us to obtain one. The license plate has not been renewed since 1994 so I am assuming he has no tilte. Please help.

You did not really "buy" it unless they signed a title over to you.
You notify them to return your money or supply you a title. If they don't you sue in small claims court for your money back.

The people you bought it from will need to give you the title, and if they don't have it apply for a lost title and then give that to you