Get rid of mice

Is there a way to get rid of mice without calling pest control? I rent from my mil and stupid me didn’t insist on having an agreement on paper. I know she won’t/can’t pay for it and I refuse to put anymore money into this house. I keep the house as clean as possible. I literally make sure everything is wiped down and swept every night before I go to bed. Idn if it makes a difference, but I live in a major city in a row home. Can I even stop them from coming into my house if all the houses are connected?