[1] Toh was awarded a scholarship to study with Yvonne Lefébure at the Paris Conservatoire, where she won a Premier Prix.
She also studied with Alfred Cortot, Dame Myra Hess, and Aube Tzerko (a pupil of Artur Schnabel).
She has served as a professor of piano at the Royal Academy of Music and a member of the keyboard department at the Purcell School for Young Musicians.
Toh is a regular visiting professor to music conservatories in Shanghai, Hong Kong, Taiwan, and Singapore, and has taught at Yehudi Menuhin Schools.
[1] Toh was married to Fou Ts'ong, a pianist, for over three decades until his death in 2020.