My husband and I will have a suitcase each and a tote bag. Don't think I want to try the metro since we'll be just getting off the train into Paris (confusing) and the luggage might be a hassle. So I think a cab is the way to go to get to our 7th arron apt.

We'll be coming from Lausanne on the TGV - can anyone tell me the way to go from when we depart the train to catch a cab?

follow the taxi pictograms in the station. many go front right outside the main front entrance. expect a queue.

You'll be hard-pressed to mess this up. There are major signs, and even if you miss the signs and just exit the station you'll see the cabs.

OK, thanks. Sounds simple enough. About what kind of fare should I expect? (going to Ave Rapp/Rue St. Dominique)

Depending on traffic 10-15 euro.

The #63 bus will take you to Rapp/Quai d'Orsay, where you can transfer to #42 to Rapp/Bourdonnais (right across from Rapp/St-Dominique) or just walk about three blocks to Rapp/St-Dominique.