Noob Questions

[BigBoyBlue]

I just started EQ two days ago and have a few noob questions.

1 - I keep seeing people type CC in chat and others answer with numbers like 5, 2, 3. What does this mean?
2- Are banks in different cities linked? I'd imagine they aren't based on how punishing this game is but wouldn't mind confirmation before I set off to travel.
3 - Can you only cast the 8 spells assigned to your spell bar at any given time?
4- Is there a way to maintain your memorized spells when you die?
5 - Is there a way to see what a certain spell actually does in game or do I need to check the wiki?

I apologize if these have been asked a million times previously. Any answers are greatly appreciated.