Tosk was born to the Gordo and Hulge.  Hulge was the village Shaman and Hulge was the lead hunter.  This afforded Tosk the education and training he desired.  He made his life in Molthune as a youth but the brutal nature of his people made him leave to find truth and honor.  Being of orcish heritage wasn't easy and he was ridiculed often but this only made him stronger mentally.  Tosk wants to show all the people of Golarion that not all orcs rape and pillage but can be honorable and friendly.