Can a car dealer that I financed a car from give me another car if my car has been totaled?

No. All finance companies require you to carry full coverage, for their protection of the money they funded If you don't, they will buy it for you, send you the bill and/or add it in the monthly payment. If you do not make the full payment they will repossess the car. Your insurance will pay you the current market value of your car, with a check, if totaled, unless your insurance denies the claim because of DUI, you get nothing, But going under the assumption you were not DUI, you can use that money for anything, legally, buy another car or whatever. But the dealer where you bought the car is uninvolved. The only way that dealer becomes involved is if you use your claim money to buy another car from them, but they will not "Give you another car"