I in all honesty don't know but I'll try
I'm not joking here...... but the EF is perhaps the most savage place ever to sell a car.
On the other hand there are a lot of people on here who really do know what they are talking about so you will get some good advice from people on how best to do so.
Hot tip - Have a look at www.autoscout24.ch to start with. (it's in German, sorry)
This will however give you a pretty good idea of an approximate market value for your car so fill in the blanks and see what's available.
Post your interests in the usual sale section of the forum and someone will be along shortly to hammer you about price, pictures and the usual bullshit that goes on.
Keep your eyes open for forum members Dodgeyken, Bigblue2, fatmanfilms who could help you out a bit.
It is odd that your husband can leave before you. Was your permit tied to his?....... in any case, I definitely can't answer that.
For the apartment, the rental situation is so tight here you won't have much trouble pushing it along.
Again, the market place here will definitely help but you will need obviously the rental value with nebenkosten, the size, location, and a few decent pics to help you out.
alternatively, there is also www.homegate.ch which is quite an agressive market place so things should shift quickly on that site.
As mentioned above in the previous post, either here or Riccardo.ch are perhaps the best places.
Remember, pics & prices are essential.
I'd recommend a quick search on Riccardo first to see what your items are worth.