With the Prog/Run switch on the locomotive in the Run position, it should operate with a conventional AC variable transformer. Locomotives should cycle through Forward/neutral/Reverse/neutral/Forward. Lights should operate with power applied. Horn or whistle should respond to conventional transformer buttons. Diesel/steam chuff sounds should also work when power is applied. If equipped with smoke this should also work if the corresponding switch is on.
Without TMCC base/remote or Legacy base and remote, testing the other features like the electrocoupler(s) is more complicated.
Maybe you could find either a model railroad club or someone in your area with TMCC control equipment to check them for you.