The water will go down the toilet in the opposite direction. You'll
have to use your starter to turn off your car.

Not that this has anything to do with either magnetism or coriolis -
but NEITHER of these factors affects the way your water goes down the
drain. Watre is not magnetic, and coriolis acts on far too large a
scale to affect small-scale circulation. The shape of the basin and
any manual force one may exert on the fluid are virtually the only
things that determine whether the imparted rotation is clockwise or
counterclockwise. That's a fact.

Bruce Jensen