Fluid should be changed every 2 years regardless, as brake fluid is hygroscopic and absorbs water from the atmosphere. This lowers the boiling point of the fluid, and eventually will mean the fluid will boil when the brakes get hot enough, and the resulting air bubbles mean you suddenly lose your brakes completely. Not good !
If you're going to bleed them yourself, I *highly* recommend buying yourself a pressure bleeding kit like Gunson's Eezibleed. You're far more likely to bleed the system effectively and it also means it's a one-man procedure. Seriously, it's miles better than shouting up/down to a pedal-pushing assistant, or trying to use those naff one-way valve things.
For a complete change you'd probably need 1-2 litres of fluid, and bleed off from each wheel to ensure all the old fluid is flushed out of each of the brake lines.
Unless you're a very heavy brake user or take the car on track, some decent brand DOT4 or DOT5.1 fluid will do. If your brakes regularly get serious use, try some Motul RBF 600. It's DOT4 but has a higher boiling point.
Make sure the bottle has been stood for a while (not just shaken about) so there's no air bubbles in it. And it needs to be fresh new stuff, not an old bottle you might find knocking round in your garage from a few years ago....
You'll want a small spanner, think it's either 7mm or 8mm from memory, for the bleed nipples.
And a container, preferably clear, to drain the fluid into - an old jamjar or similar.
If you use a pressure bleeding kit that uses a spare tyre for the pressure, be sure to read the instructions first, you may have to drop the tyre pressure first.
