Thanks. Yes, I intend doing the tyres, tubes and cables. The bike has about 20k miles on it even though it hasn't been used in some time. The cassette or chain have never been changed. Not something I need to rush in to, but will do it in the medium term.
In terms of the groupset. I thought the top Shimano MTB groupset was on the Appalacian. I had a recollection it was the Deore XT. However, it's obviously Deore. Was XT around at that time and was it better?
Maybe I'm confusing myself as it was possibly the top Shimano groupset available on a Raleigh bike at the time.
I'll post a few "after" shots when I get working on it over the next couple of weeks.