Hello fellow travellers: first of all I must say I am perhaps an intruder here, since I have started travelling with a CAR

Anyway, Iwould try to get an answer from your gentlesness and wide open minds…
THAT'S WHY:
My wife and I are projecting, among other possibilities, a trip to Kazakhstan, departure from Norhern Spain. As I have said, we will go with our own 4x4 (a camperized Toyota HZJ78) and would like to take the Northern route, that is france-Germany-Czech Republic-Poland-Ukraine-RUSSIA and Kazakhstan.
Our question is: Is it possible to CROSS Russia wit a car of our own —to go and come back? Is it expensive —in terms of Visas and bureaucracies? How long does it take to get a Visa (more or less)? How far in advance do we have to take Visa?
We have been amazed to see that Google maps is unable to build routes through Russia: does that mean Russia is closed to foreign road traffic?
Of course we will ask in Russia's Embassy, but we know for sure that the info you travellers can give us is probably much more accurate and reliable than statal one…
Please travellers of the world, do help us…………
With many thanks in advance
Tomás and Beatriz