He was a student at the Petit Séminaire de Québec and followed this by a study of medicine, receiving his medical diploma in 1844.

Taché practised medicine in Rimouski, and, at the age of 27, he was unopposed for a seat in the Legislative Assembly.

His activity in politics led him into the newspaper business as a writer renowned for his caustic political wit.

He worked as a writer and editor until 1859 when he left Le Courrier du Canada to pursue other writing full-time.

He returned to public life in 1864 as a senior civil servant in Ottawa for 24 years in literary, cultural, scientific and political areas.