Yes
yes sure they can get visa at airport easy
yes
Namibia passport visa is free to Germany.
I have greece refugee travel document do i need visa to visit eu or which country for i don't need visa
Visas are not required for US citizens visiting Namibia. If you plan to live there for an extended period of time, you may be required to obtain a visa. That is something you will have to check into. http://www.places.co.za/namibia/
Yes
Is namibia passport a free visa entry to canada? And which other country is it also a visa free.
Yes
because lebanese love sweeds :) they get a one month visa directly upon arrival ( free of charge ) for more info on the the swedish passport go to http://en.wikipedia.org/wiki/Swedish_passport.
No
There is a great website TIMATIC WEB which can answer any of those questions easily.