Yes
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
Yes Americans do need a visa to enter the Czech Republic.
Is namibia passport a free visa entry to canada? And which other country is it also a visa free.
Yes
No
No
There is a great website TIMATIC WEB which can answer any of those questions easily.