I know I am an American; however, we have no funicular's in America. This is a wonderful experience, and if you travel her you must try this.
Basically you enter a train that travels upward at a high rate of speed through the tunnel in the mountain and heads to the top.
A word of warning though; after I visited the tfunicular the train stopped in the tunnel and caught on fire. Many people died; however, most had exited the train and tried to climb the stairs upwards with the smoke. If caught in this situation travel downwards.
After a days Sking and almost Ski to the door you can get yourself a Grande Marnier Hot Chocolate and a stool/chair to purch on.
It does not sound much but after a day on the slopes it is Heaven, or I hope heaven is better because it is very good.
Not sure on price, you will not care. They do pancakes with Grande Marnier in to.
The ride from Bourg St- Maurice is nothing else than all uphill, but all doable. You will keep your eyes on the mountains around and it will prevent you from thinking that your thighs are burning... No worries, it's all good for ya!
The way down, like a lot of descents from mountain passes is extremely scenic and mind blowing... Make sure you stop often and take pictures...
On top of Col de l'Iseran, not too much, no Mc Donald or anything that kind. Just lots of mountains and a sign saying that I have just climbed for 50 km from Bourg St-Maurice.
You will have open views over the mountains, the last few houses from Val d'Isere and all the glaciers you want... It is very pretty and well worth the detour...
The reservoir offers great photo opportunity to contrast with the mountains and hanging glaciers. Worth a visit.