None. But Mel appears to be busty while wearing her summer outfit, during a somewhat surreal musical scene.

Just as the title mentions. A grandma is hit by a reindeer, off-screen, but she is shown lying on the snow before she disappears.

A police officer refers to Grandma as a "broad".

None.

Grandma has some medicines.

Beer is mentioned once during the titular song in the end credits.

The scene with grandma getting run over by a reindeer isn't as frightening as it sounds. This is a Christmas cartoon for all ages.