where?
New Zealand
Ernie Toshack with the Australian cricket team in England in 1948
 His performances were enough to ensure his selection for the tour of New Zealand in early 1946, where Toshack made his Test debut in the one-off match against the hosts' national team. 
when ernie toshack with the australian cricket team in england in 1948 first match played? Early 1946
wiki:8725094
Ernie Toshack with the Australian cricket team in England in 1948 [SEP] Background
A left-arm medium-pacer, Toshack made his first-class cricket debut in the 1945–46 upon the resumption of cricket after World War II. His performances were enough to ensure his selection for the tour of New Zealand in early 1946, where Toshack made his Test debut in the one-off match against the hosts' national team. From then on, Toshack was a regular member of the national team and played in every Test over the next two summers, fitness permitting. Toshack played in eight of the 11 Tests during this period, taking 36 wickets. Towards the end of the Test series against India in 1947–48 in Australia, knee injuries began to hamper Toshack, and he was in doubt for the 1948 tour of England.