There are a few reasons why Paris still has old trains. Paris still has old trains today because it makes Paris look romantic and for historic reasons.
Eurostar
There are direct trains from Frankfurt to Paris daily with TGV Other carriers provide trains between these cities via Koeln
You probably can get cheap trains if you book in advance on the Internet.
Eurostar trains run between London and Paris/Brussels. To travel from Paris to Montpellier, you need to contact SNCF (French Railways) and enquire about the TGV trains.
Of course there are trains from Le Havre to Paris. Le Havre is a large city. Any city that size will have a train service.
The RATP (Régie Autonome des Transports Parisiens) runs the buses and trains in Paris.
Trains go from PARIS AUSTERLITZ station in 1h 30min
Their still trains
Alas, no. What makes it worse is that very few stations have them either. EDIT: the RER trains have toilets. The metro trains don't.
in 1980, new trains stopped doing that but on some trains such as the HST, they still
Germany !
the old trains