Gordon which model have you got there are other versions and have you connected the tv to your router yet.
Either wireless or Ethenet cable
Is it either of these Toshiba UF3D 50 Inch Smart Fire TV
127 cm (4K Ultra HD, HDR10,
OR
This One
Toshiba 50UK4D63DB TV 127 cm (50") 4K Ultra HD
Smart TV Wi-Fi