Your D60 doesn't have an AF-screw mount if I recall correctly, so can only use auto-focus with AF-S lenses (i.e. lenses that have focussing motors in the lens, rather than relying on the body for AF). The newest 50mm f/1.8 AF-S from Nikon will work fine on your D60, but is more than £100 (more like £180, e.g. this from Warehouseexpress:
http://www.warehouseexpress.com/buy-...-lens/p1525420)
The older AF version (
http://www.warehouseexpress.com/buy-...af-lens/p12869) is ~£100, but whilst it will 'work' on your camera, it won't auto focus so you'll be limited to manual focus only. You can still get some great images with this lens and manual focus. It will mount, won't cause any harm, and will allow you to use auto exposure modes etc, it's just the AF that won't work.
Without wanting to throw a spanner in your thought process, I often find that a 50mm is a little tight for a general lens. I picked up a 35mm f/1.8 AF-S (which will work and focus on your camera, and is ~£160 -
http://www.warehouseexpress.com/buy-...-lens/p1030389 ) and I find that this now lives almost permanently on my camera. My 50mm rarely gets used since buying the 35mm.
If you have time, I'd suggest using your 18-55 kit lens (assuming you have one?) at 50mm and at 35mm (tape the zoom in place!

) and see which focal length works best for your subjects and style of shooting.
Hope that helps