The video cassette recording function of your Toshiba device worked only with the analogue tuner built into it (and not with the digital tuner that it uses to record DVDs).
Since all analogue TV transmissions have now ended, your device (along with every other VHS recorder in the country) can no longer record TV broadcasts onto videotape. (There is a 'workaround', whereby you get hold of a Freeview set-top box, or similar, and then feed the ouptut from that device to the VHS recorder, but it's fiddly to get working).