Well I think that you could have found all the answers with a simple search on the forum in less time that you wrote this post.
1. If the wireless network requires encryption that means you need a password to log on to that network.
2. About you scanning the other networks around you, we do not support illegal activities here and besides that you don't even have the slightest idea what you are trying to do.
3. About your network cards I'm sure google can help, and about installing them to your live cd aswell
4. For your VMware question I suggest you read the Wiki or the FAQs again.