The van is the Mystery Machine, the vehicle used by the group from Scooby Doo, who hunt down ghosts and ghouls in each episode.

The car behind that is the car from Ghostbusters. A movie about a group of people who hunt ghosts and capture them with special tools.

If you didn’t know either that’s fine but I would highly recommend Ghostbusters, it’s a fun movie.

Scooby Doo is great but imo nostalgia is the strongest part of it (The live action movies however are weirdly good so I do recommend those)

Hope that helps :)