Answers: to all E53 X5
1. Lug bolts: use the ones you have, or buy new ones to make the wheels look better. All OE Wheels use the same bolts.
2. Tire pressure sensors: Your vehicle does not have them so why would you want to add something that will not function? Your vehicle uses the speed sensors at the hubs to determine RPMs match at all wheels. If not, it trips the light. (others will chip in if there are any 2006 applications with a TPS sensor)
3. Tire pressures: will depend on multiple factors, trip speeds, average temps, weight loads, tire size(s), etc. What will be on the rim?

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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green