3. Statler Toyota

As the radio clicks on, we get our first reference to 'Statler Toyota', a car dealership that will later be seen in in Hill Valley's main square (it's the source of the truck that Marty cherishes so much). There's a Statler dealership in every iteration of Hill Valley - they're 'Honest Joe Statler's Fine Horses' in 1885, 'Statler Studebaker' in 1955 and "Statler Pontiac" in 2015 – and so this is basically our first example of the trilogy starting a running gag.

https://www.denofgeek.com/us/movies/back-to-the-future/241535/back-to-the-future-trilogy-things-you-missed