Would you ride with this tire with cuts in the sidewall?
I would not ride that tyre.  Pretty sure I can see tube in the second photo, and that's asking for a sudden blowout.

You might choose to put a boot/patch on the inside of the tyre, and use this as an indoor trainer tyre only.   Might be okay on rollers, would make a great front-wheel tyre for a direct-drive trainer (ie, the wheel that doesn't turn at all.)

I certainly would not ride on the road with that ever.   

It is dead, buy a new tyre.