train from munich to nice,france.

The best site to check most European railway schedules is the German national rail site. For your particular trip, you can also purchase tickets there if you wish to take advantage of the advance-purchase discount fares, since part of the journey is in Germany. Unfortunately, because Munich-Nice is "across" the spokes of the hub, it's a long trip. Some of the early departures travel through just Germany and France....others hit Switzerland as well. Prices, of course, will depend on which kind of seat-accomodations you want, and how far in advance you book.

You might look into a flight from Munich to Nice on a European budget airline. www.airberlin.com has these flights. Much faster and less expensive.