Black and white tegu

Where can i purchase a baby b&w tegu an be for sure its a male.

i would need to know where you are located to suggest a source...though many reptile suppliers do ship, it is best to be able to see and examine any animal prior to purchase.

as far as gender, mature males are larger and have more pronounced and folded "jowls" than females. this is a species that grows quite large, so be certain you can accommodate their growth if you get a juvenile. very young specimens would probably need to be surgically or DNA sexed to guarantee a male.