I ill try to answer all you questions in this letter.
First of all, the main train station is on the Nevskiy prospect (if you mean Moskovskiy vokzal), you can get to our apartments bij bus, bus-taxi (it's a lot cheaper then taxi, but a little bit expensier then bus), also you can get there by metro (but I would recomened you bus or bus-taxi - it's easier to use.
We don't have Wi-Fi in our apartments, but there are a lot of places near them there you can get it.
I will try to post some photos here, but not all of them off cause.
Will be glad to help you.