Yes of course it is possible to do so.
(One possible route you can take from Moscow) Belarus Poland Germany (Arrive in Belgium)
yes, they can travel.
NO
I have no idea where "Belarus" is but I'm assuming you take an airplane. Sorry if this sounds like sarcasm. :)
No. Technically it is not possible.
Belarus
Yes a visa is required.
There is currently no know and confirmed way to travel in time.
No, they do not go that deep
There are different ways to travel to Germany from India. The fastest is by plane. You could also try travel by train and ferry, but the trip would take 2 to 3 weeks. It is also possible to travel by vehicle. The trip would take about 4 days, non-stop. The suggested route on distancebetween.info goes through Pakistan, Afghanistan, Uzbekistan, Kazakhstan, Russia, Belarus, and Poland.
If you were to travel between the Czech Republic and Belarus, you would cross the country of Poland. Poland lies between the Czech Republic to the west and Belarus to the east. The most common route would likely take you through major cities like Warsaw in Poland.
Techincally, it is possible, but only because we haven't proven it impossible, either.