More than likely it is about a 2004 or earlier Paul Tracy Kart made by CRG. That kart will be fine for you to learn with. I had one that I thought was a pretty good kart. Wish I would have kept it and put a 206 on it.
That Rotax will probably only need the airbox update and maybe the clutch. Is the clutch gold with holes in the cover or the newer style with the black cover with no holes? Otherwise you’ll need an EVO kit to get it up to spec. What’s your location?