1.i dont know im too new to dualboxing
2.you need to switch computers.. there is no macro for looting
3.on the main character? i am guessing your maing character is the one you are controlling so just right click the corpse....
4.you can go to the quest panel and click share quest. make a 'big button' macro [check the macro section on this site] this will autoaccept the quest. this also goes for inviting your character and such
5.you dont need any addons, its all preference. if you want recommendations try curse-gaming.com and look for a good action bar mod and a mod that shows casting bars for your alt if you are gonna be playing casters
6.perform movements as in running around, place to place? just /follow the main:]
7.i think pretty much all computers these days will do that for you as long as its an up-to-date computer and not something 10 years old. Google "tbc req" click the first link just go with the recommended specs there