1. Take your board with you. You'll have to pay probably £20 quid or so for each journey on the plane with it.
2. Don't worry about not having a car, so long as you plan to do lots of weekend trips and not just for the odd 3/4 hours. If you have no car and you just want an afternoon of snow you'll be screwed. If you want to go for a weekend it's no problem.
3. You can also get special offers like purchasing ski lift + train tickets together so you can save a few francs that way.
4. Have fun!