Can't fault David's answers apart from clutch and gearbox. Generally clutch should last upwards of 80,000 miles but depends how you use it. Mine went at 36,000 miles but that was due to a leaking slave cylinder. Gearboxes are pretty bullet proof. Clutch replacement requires an engine out procedure unless you want to bend the output shaft. Cost depends on what you are paying for labour.
As David says oil and filter every 5,000 miles is a bit of a pain, rear tyres every 8,000 miles (drive dependent).
Nich.
Nicholas John Peter Tinker - # 484
Manufactured on Tuesday 27th April 2004 @ 12.17.47.
Commission Number: 24468.
Brochure Model: M3 Tourer 4.6 V8 260PS.
Specification Code: L01B.
CICode: D1511.
Trim Level: TL8.9 (M3).
65th ZT-T 260SE to be made out of 115.
11th ZT-T 260 SE in Pearl Black (PBT) out of 23 produced. Manufactured in the UK by MG Rover Group Ltd.