Hi Paul, welcome from me also.
Before buying anything ASK this lot.... usually been there, done that...
this is the most helpful forum for the LT you'll ever find.
If you intend doing servicing yourself, and we suggest you do to save big bucks and also learn how to look after the bike better, then spend some spare time watching Kirk's fabulous online service videos
... great way for you to get introduced to the bike.
Most of us wish we'd had for them for years instead of them just going online this year... they are a huge help, along with the Clymers you'll handle most any job needs doing.
Many threads about oil, tyres etc.
There's only about 3 rear tyres rated for the LT's weight, Metz, Bridgestone, Avon Storm II (I think)... I've always run Metz and very happy with them for the most part. 42/48 cold pressure is valid. Bridgestone rear a bit cheaper, but doesn't last as long normally according to other users.
Oils, follow manufacturers specs, ideally SG rated oils only for engine, some exceptions, check the specs. Dont just buy generic car oil.. doesnt have the right balace of chemicals apparently (search the threads)
For manuals etc check the Technical Files section, you'll find a lot of information already there. But you'll need to buy your Clymers Manual or the BMW shop manual... Clymers probably cheaper.