A character is presumably ran over by a truck, although it goes offscreen right before it happens.

In season 2, it is implied that a man is decapitated from a sharp blade, A yellow liquid splatters On a wall because the liquid is some sort of acid.

"God," "crap," and "hell" respectively.

No one in the hello neighbour series smokes.

The show is very suspenseful then the video game series not to mention a bit more graphic

No gore or anything, just the main antagonist of the show is shown to e scary, he yells and shouts loudly and has a bulky strong appearance/threat to the kids. I would say its not that ad though, most likely okay for 3rd graders and up.

Some scenes are scary for under 7. This series is mainly adventure, horror.