Horror Engine Problem

I am using the horror engine kit and I want to make the character drive a car, so I imported a group of cars from the marketplace, but I do not know how to make the character enter the car by pressing a button , I followed many tutorials on how to posses the car, but none of them work

Making those kinds of things requires a Blueprint developing knowledge. HE does not came with that function by default, so you have to make it for yourself. I recommend you try mix HE + custom blueprints to make that possible. It is possible to do it and many games have already implemented it (example: “they are here” game)