Despite taking exams for three consecutive years, Tosun was not admitted into drama school because of his weight but he did not allow this to stop him pursuing his career.
He then found a job selling tickets at a theatre where Levent Kırca often performed and eventually, he enrolled in the Mimar Sinan Fine Arts University.
Tosun appeared in over several films and television shows and often performed at Turkish State Theatres.
[2] Tosun was renowned for his role as Tombalak in the comedy series Bir Demet Tiyatro and as a voice actor, he provided the Turkish voice of Rex in the first two Toy Story films as well as dubbing the voices of villainous henchmen in Disney Renaissance films.
On 30 August 2000 Tosun died at the age of 33, as a result of kidney failure due to intestinal ischemia.