1. Kazanskiy railway station (!)
To get there - metro station Komsomolskaya (better radial). There are 2 stations Komsomolskaya: radial and circular.
Attention! There are 3 railway stations near Komsomolskaya.
Take a train 54 to Cheboksary. Every day, departure at 18:25 - arrival at 08:00.
In Moscow you can also buy tickets back (from Cheboksary) - train 53.
2. Schelkovskiy (Moscow) autobus station (!)
To get there - metro station Schelkovskaya.
Take buses to Cheboksary. Every day, 18:20 - 6:24 and 18:50 - 6:54.
Ticket's cost - 350 rubles (10 euro).
3. The forest near metro st. Bulvar Dm. Donskogo
If you want to spend a night in Moscow and sleep under a tent - you can go to metro st. Bulvar Dm. Donskogo, go out and take to the West (10 minutes), cross the highway and go to the forest.
You can go to any forest out of Moscow - get their by suburban trains from any railway station (on the map).
You can also try to sleep on the stations (if you have a ticket).
4. Ambassy of Slovakia
To get there - metro st. Mayakovskaya. The address - Yuliusa Fucheka street, 17/19. Phone: 956-49-20, 250-10-70.