Zymols good stuff, but can be expensive.
Range of stuff, from Autoglym, Meguiars, Poorboys, plenty of info can be found here
Detailing World a wealth of knowledge there. As for wheels, give them a good clean with a wheel cleaner, then seal them, and a good tyre shine.
Mods wise, id lower it, 4-2-1 manifold, full exhaust system, induction kit, different wheels, and leave it at that, unless you wanted to go onto look at a bigger cam, and possibly (im not sure which 'box it is on 2000 cars) a different gearbox, as early VTR's IMO come with ratios that are all over the place.
Then, depending on your budget there's the more expensive options, Individual Throttle Bodies/Carbs, Turbo/Supercharger etc.
Lowering can cost anywhere between £130 to around £200 (or even more, or less).