Questions!please help

Guys,these days i ve been reading and seeing alot about guild wars,and i have almost decided to buy it.But i have some questions about this game and i want answers.
First,does that game have pve elements,such as bosses and raids?
Second,as i know,players can reach up to lvl 20.But,cann't they increase their power more?Reaching the 20th lvl the character stops to develop?
Finally,does that game have plenty of weapons and armor?Or each class has 3-4 costumes?Please tell me!!

1. Yes, the PvE part of GW contains many bosses and many missions
2. Depends on which game you buy, not in all chapters you level with same velocity, in factions you can reach lvl 20 in one day. In tyria it takes more time. After you have reached lvl 20 the game starts being fun. there comes no more power gaining after reaching lvl 20, except for 30 attribute points. But the game is about skills and builds, not about lvls.
3. yes there are plenty of weapons and armor in the game.
Check www.guildwarswiki.org
I hope you buy the game

There are a lot of bosses, but most of them are (too) easy.=P There are no raids, but there are missions and quests to do.
After reaching level 20 you can't become much stronger, but Guild Wars is more about real skill than stats.=P
There are around 6 different armour designs for each class.

After level 20 <and before> you make your character better by capturing elite skills. The whole key to Guilds Wars is knowing what builds work where. Sometimes skill bars can be generic damage based, other times you must tailor your build, and often your party, for particular encounters.

After you hit 20 you still gain "levels" but you are awarded a skill point instead of a level. Mission are like raids but with less people and more fun, lol. <played 2 years of WoW, so I don't say that lightly>

The game appears simple at first and then you start seeing that there is a lot more to it. Anything can become easy once you know how to do it. The game seldom let you coast for very long before you run into something that will give you a pause.

This is sadly true

If you want a challenging boss your best bet is a Ritualist or Elementalist. Bazzr Dustwing hit me for 387 damage with a channeled strike yesterday. That REALLY stang!

My top three "Kill for Fun" bosses:

1. [wiki]Bazzr Dustwing[/wiki]
2. [wiki]Wavecrest Stonebreak[/wiki]
3. [wiki]Kunvie Firewing[/wiki]

^^^
Hehe, let him buy the game first and then worry about what bosses do more damage.

As others said, check wiki, it has everything u want to know and everything that you donot want to know as well

To clarify on what this guy said. There are WAY more then 6 armor designs for each class. There are currently 25 armor designs for each of the 6 core classes (http://gw.gamewikis.org/wiki/Elementalist_armor).
However, there are anywhere from 6-11 armor types per game (Phrophecies, Factions, and NF).