I bought a Prolight 3000 last year. It had come from a school, and I got it intact and working, original computer and all. I have used it several times since, and I can just say - use it the way it is. The software does all the normal things, and you don't have to mess around with anything. It's not hard to use, once you are used to the interface. Mine runs under Win95, so yes it's old. However, it works just fine, so I use it as is. Since you are just learning anyway, there is no advantage to updating the controls until they fail on you. Keep in mind that that may happen, but until then - make chips!
Incidentally - you have a lucky find - mine didn't come with the turret(ATC), nor a tailstock (factory option, never installed). I found a second one, with no driver box or computer, and it doesn't have the ATC or tailstock, either.
(The second one is set up for gang-tooling, though).