If you have the grills that go at the front of the door, then yes, these hold 13cm speakers (5"). If you buy a good set of components with cross overs (i recommend jbl's, they're dirt cheap and sound great) then install the tweeter in the dash, or on the door. I used the hole in the door for the mirror adjusters (you dont need them). If you dont have the grills, you can buy them from dealers at around £10 plus vat each, or email me and i'll sell you a brand new pair for £15 inc post (i gotta few kicking round).
To get the standard speaker out the dash you need a 90degree screwdriver. If you have a good headunit these wont really need amping, but if you have a crap headunit and want it up loud, these will need amping. Nothing mega powerfull is needed to power components, and usually a 50w rms amp will be PLENTY loud enough.