Born in Gornji Miklouš (part of Čazma) in central Croatia (then Yugoslavia) in 1933, Serdar graduated from the Academy of Dramatic Art of the University of Zagreb. He was a member of a theater group in Varaždin, and later joined the Croatian National Theatre in Zagreb. He played many television roles, including in comedies, and theater roles. His son is actor Igor Serdar.
Among his many television appearances (and by no means his most prominent), he also was a co-host with Stevo Karapandža of the popular Yugoslav weekly cooking show Male tajne velikih majstora kuhinje (Little Secrets of Great Chefs) produced by TV Zagreb, which started in 1974.
Serdar died in Zagreb in 1985 at age 51.
- (23 June 2003). Gornja Jelenska: Spomen glumcu Ivi Serdaru, Index.hr (reporting on a celebration of the 70th anniversary of Serdar's birth in the town of Gornja Jelenska, where he had lived)
- Dean Sinovčić (2 February 2010). "Stevo Karapandža - četrdeset gastronomskih godina kuharske zvijezde" [Stevo Karapandža - forty gastronomic years of star chef] (in Croatian). Nacional. Archived from the original on 24 July 2012. Retrieved 25 July 2012.