Nickolaus - You will need to provide us with a few more details to get any useful help. i.e. What specifically do you want info about?

Andrea - We didn't find the 'agents d'immobililer' very helpful until were we here in person, but you can take a look at what is available at Immobilier et annonces immobilières | 1er site immobilier français.
Public transit here is great - clean, rapid and serves the city well. Get a great map at http://www.tcl.fr/index.asp?page=plan_reseau - the tram lines and the C# lines have dedicated lanes and run almost as fast as a metro.

Best, Siara