I want you to work this out....
but Googling "Pro Tools 2018.10 systems requirements" tells me that Pro tools 2018.10 for example runs on Windows 8.1 or Windows 10... so can you find a device driver for your old Mbox (which you still have not told us the actual model of) that runs on Windows 8.1 or Windows 10???
But again, you would only be saving say US$150 for example for a Focusrite 2i2 interface at the low end... so farnarkling around a lot here is a waste of time and effort. And the Focusrite will sound better. We don't have any idea if that will be enough interface for your needs... because you've not been clear on what those really are (how simultaneous performers? mic preamps, DI in, line in, ADAT in/out, AES/EBU In/out, line outputs (separate performed cue mix needed?), monitor control features, headphone outputs, direct monitoring features, etc. we can't even guess based on the Mbox... because we don't know the model.)?