I want to ask you guys/ladyes about guild wars, yes i know it probably sounds strange "a person who haven't tried GW before"

well yes i have no clue about it....i was thinking to buy the game as i don't find a key. (no i'm not here to ask for one

Well first of all...do i haf to buy all of it? mening the first guildwars, eye of the north and all of the addons in order to have all the game content? or the newest addon contains the older ones aswell...
2nd are there good RP servers? meaning : people enjoying it, not mocking or other stuff, and RP newb friendly?
3rd I'm verry interested in the combat system....personally, i like D&D online stormreach...(sorry if i am not allowed to name other games in this forum. new at forum stuff and not plenty of time to read all the rules)...yes so personally i like it. i like the combat system really... and the fact that the dungeons give you a great feeling...team spirit, (if you find some RP-ers it's great)...for the ones you don't know it...the combat system is simmilar to TES 3,4...shift=block....click=atack...the NPC's don't run into you...they are solid...not like in others mmo like wow or lotro. so if you stay "in" a door when it opens...your back will be safe....
So i'm asking you if GW combat system is similar to the one in D&D as they both are instance based or so i've heard about GW...
Thank you for having the pacience to read this post, and i'm waiting for some information from you guys.
P.S. ....sorry for my bad english
L.E.....i remembered some things..... How is the skill and character leveling (evolving) system?
And how is the game exactly? is it "fantastic" like wow... plasma cannons, strange beings, spaceships, strange maps,,,,,or the enviorment is sticking to the , classical way i could say....you know...natural trees, islands farmlands.....the classical enchanted swords, ice , sonic....enemies like elementals, ghosts, skeletons, orcs goblins..... or it's like...big robots or creatures that never heard of untill the game appeared...