Try comparis.ch for price comparisons of both health and car insurance, but be a little cautious, they're not quite as neutral as they make out to be. However it's a good place to start.
As far as your car is concerned, include it in the inventory of goods you're bringing into Swtzerland. If it isn't new you won't have any import tax to pay. There is a fair amount of paperwork to get the car imported and registered though.
This user would like to thank catandmouse for this useful post: