This is likely to be a dead end, for a few reasons:
#1-M-Powered only works with M-Audio interfaces, which are pretty much to bottom of the barrel for quality
#2-all modern versions of Pro Tools require iLok(I do NOT recommend the cloud version of iLok except in emergencies)
#3-no old version of PT(M-Powered or regular) is going to work on an old OS or computer.
$3-you are not likely to find any current drivers for old M-Audio stuff(drivers being another weak point of the brand)
If someone is offering this stuff to you, I'd say thanks, but its just too old to use(the keyboard MIGHT work, but I remember hearing of issues).