1. EvoX will work on your v1.0 box with that chip.
2. The bios I used for the same combination chip and xbox version was X2 4981.06. I'm sure there is a newer, better one, but if you're just looking for something to get going until you know better what you want, that one will work.
3. I don't know if XBMC will work with that combination, I'm sure others do.
4. Here is a link to the tutorial I used to flash my bios. htttp://hackdabox.eternalnoob.net/Duox2_Flashing.html I used the cromwell method and when the Xbox spit out the Eurasia DVD so I could throw in the bios DVD, I also switched the chip over to the other bank so as to not write over my Linux-Cromwell bios.
5. To connect to a PC, will either need a crossover cable if you are connecting directly, or a straight through cable with a router between. You will also need an FTP program like FlashFXP and you will need the IP address of your xbox. Make sure you are running a dash that will allow you to FTP in and the username and password if required (usually xbox and xbox).
6. I can't remember exactly where to find the bios on xbins. You'll just have to poke around the bios folders until you find it. You can find EvoX in the dashboards folder. Really the best way to figure out xbins is to look through the folders and familiarize yourself with what is found where.
7. No, you don't need a dashboard. You can use the MS dash if you want, but what would be the point?