His first taste of acting came in a school nativity play as a Roman centurion in a suit of Armour made from cardboard.

[4] Toussaint's first professional role in acting, was as the Genie in the Lamp in Aladdin at the Churchill Theatre in 1990 in a cast that included John Inman, Paul Shane, Susan Maughan, Eli Woods and David Janson.

[1] His other extensive theatre career included performances in A Doll's House at the Young Vic, Macbeth and The Merchant of Venice for the Royal Shakespeare Company, Twelfth Night at the Nottingham Playhouse, and more.

[5] Toussaint's big break on television was starring as Barrie Christie in all 37 episodes of the ITV crime drama The Knock from 1994 to 2000.

[5] In 2010, Toussaint starred in the Mike Newell-directed film Prince of Persia: The Sands of Time alongside Jake Gyllenhaal, Gemma Arterton and Ben Kingsley.