You simply start typing and hit enter. You move the camera with the arrow keys.
For private chat, you add a person as your friend (this may be temporary), then right-click on the person on your friend's list and select "message".
There is also a clan chat.
just type in the chat box at the bottom of the screen
If you mean quick-chat, you can't - just avoid the Quick-Chat worlds.
You can, you are probably just on a quick-chat world, simply just change to a non-quick-chat world to fix this.
you just click on the chat box at the bottom of the screen type what you want to type then press enter
RuneScape is intended for people of at least 13 years of age, but you don't have to be 13 to play; you just won't be able to chat freely and will have to use the Quick Chat feature.
Lol...... just put a fake ages so you can use the chat.
Nope. Only text chat.
You are not actually restricted to use Quick Chat (QC), you are probably just on a Quick Chat Only World. Either that or Jagex have Included a Quick Chat Only Ban in the New Update in August 2011. Source(s) Knowledge with my combat level 138 RuneScape character.
There is most likely a Cc for every kind of skill there is in RuneScape, the best way to find them is look in their respective categories on the forums or in the general chat forums to see who started one.
You type buttons
runescape
yes but you can not chat