Well you've both been very helpful in fact. It seems like whatever it is, it's not much use to us - we're CD and local radio type of people. We have a plug in GPS which we hardly use so don't really need that. I was told it was a Toyota radio, but they're not much help either. We don't have a VTR I don't think. We're thinking go to Halfords and have something new put in.
We have the drop down TV/DVD screen in the roof, so we might lose that I guess, but if we can't use it anyway.
The start up screen says Multi Media something, and then quickly switches to the one pictured. With a little help from Google image translate we can see it's asking for a password, and saying 'What is your pet's name?'
There is a button that switches the keyboard to English alphabet, but the pet's name would presumably have to be inserted in Japanese to work.
A friend said: (76032). This appears to be the unlock screen for Toyota Radios.
This video shows someone unlocking it: But I couldn't really follow.
This is another photo of ours.