On the homepage, go to the tab "Community" then click "Hi-Scores". You should then see a list of the highest ranking players in RuneScape based on overall experience.
It's hard to keep up with who's the highest player on RuneScape, but go to http://services.runescape.com/m=hiscore/overview and you'll be able to see the always updated list of ranked players.
A players age is not displayed anywhere on RuneScape, nor the website.
See related links, for a list, at Runescape Wikia.
In the game, click on the skills icon. You will see a list there. Or see this list: http://runescape.wikia.com/wiki/Skills
Any questions asking about specific RuneScape players, or asking for their passwords, will not be allowed in an answer. That just creates unwanted spam. If you want to know the stats of a certain player, you can look them up on the RuneScape Hiscores. See the Related Link.
If you go on runescape highscores, you can see that lots of people have 99 skill level in everything. Every single one of these players will have all the skill capes
There's hundreds of quests, that involve all sorts of things like guessing, mazes, fights there's too much to list so it's best you see for yourself.
If we listed all the clothes here, it will just spam the page right up, it just best go on Runescape.com then just type it in the knowledge base, and see what it comes up with.
I can't find this listed anywhere. I don't think the information about skillcapes is available, but you can find out how many players are eligible to wear them. You can choose "Community - Hiscores" from the main RuneScape page and see how many players got each skill to level 99.
Click on the '2007 Patriots Roster' link below to see the players on the New England Patriots 2007 roster.
As of the 2008 season, LSU has had 253 players on NFL rosters. Click on the 'NFL Players from LSU' link below to see a list of those players.
I don't see so much problem with the game itself; the main problem is other players, who sometimes use inappropriate language.