OK so, as a kid I had a video with a few xmas films on it, for the life of me I can't remember the film at the end of the video I just remember the first scene was a kind of yellow snow buggy/bus travelling through the snow with a family in it going to the north pole. I think the kids father worked for the north pole or something.. it was an 80's films. Sounds familiar to anyone?

Possibly The Night They Saved Christmas (http://en.wikipedia.org/wiki/The_Night_They_Saved_Christmas)

Ur good! I think that's it!