The server is like any classic server after the Kunark release. So your answers are
Yes.
No. We peaked at 1500 players online when Kunark opened and fluctuate from 250-1000 on normal days.
EC is the place to trade.
No. No new quests and XP from quests tapers off around level 13-14
I am running on a Windows 7 with dualcore. I didn't have to change any settings.
Erollisi Marr:
http://www.project1999.org/forums/showthread.php?t=7523