1. You win by one of the following conditions:
a) At the end of a turn all enemy units are dead. (might be wrong here)
b) You own 2/3 of the cities on the map.
c) You capture the enemies capital.
You can surrender on your turn at any time.
2. Each faction has four units.
3. I don't have dial-up, but I don't see why it wouldn't. It's not bandwidth intensive... well, no game is, they just tend to need a reliable, consistent connection. Since this is turn based it doesn't really matter, so I don't see why it shouldn't be fine.
4. I'd say it's fairly quiet online, but the lobby doesn't display people playing a game so you've no idea how many gamers are on but in games... it's certainly not Battle for Wesnoth size though.
5. No idea
