On the PvP server, you will be either good or evil, and cannot group with the opposing side. Guards from the opposing side will also chase and try to kill you. There are also level restrictions regarding level difference on killing the opposin gplayer. The further you get from your home city, the larger the difference and greater the danger.
Here's the details.
Here's some additional PvP info.
On non-PvP, you can group with anyone of any alignment. Guards will still chase you, though.
You will get 6 character slots, and for a few extra dollors you get 2 more slots plus other web site benefits.
Any race can be any class, but all evil races start in Freeport, and all good races start in Qeynos. Some races are neutral and you can pick your starting city. When you create your race/class it will all be presented to you.
When picking a server, consider Najena. It has a large and active population, players in all zones, guilds large and small, and a stable economy.
And when you get there, look me up. I can help you get started with some gear, spell upgrades, directions and coin.
Good luck!
Edit: Added other PvP article link
Edited, Thu Mar 9 12:52:34 2006 by tutanbriarpaw