Clutch, gearbox or something else!

[Logix_00]

Hi new to this forum and not had a Yaris for long! I do most services and work on cars I have owed but this one has me stumped.

My girlfriend recently bought a 2000 plate Toyota Yaris 1.3 SR, it pulls fine and drives fairly well few little things to do (tracking and wheel bearing!). I adjusted the handbrake the other night and took then took it for a first spin. When in gear there is grinding noise that gets louder the faster you go. The clutch is soft and the gear changes aren't great but I've driven far worse. As said it makes this noise while driving along but if you press the clutch it stops maybe very quietly continues.

I've changed the gearbox oil and bleed the clutch neither of which have helped. I've even checked the hight of the clutch as per spec but seems to be in the right place.

What I need to know is this the clutch, gearbox or something else and what people would recommend as a plan of action?

Thanks in advance.