I'm not that kind of sure --is that one google account can be uesd with many blogs ? i alwys it's one to one !
You can reapply for adsense account in your own name after rectifying the defects as pointed out by the adsense team for unbanning. I don't know how successful you will be if you apply in someone's name with the same address...
Yes, your 1 google account can be used for all of your blog create ads channel name for your blog, so you can check Which your blog have much earning
The very first thing what you should do if your account gets banned is writing a email to them and you should discuss about why your account is being banned. There are change to reactivate your account if your answer is correct.
iF your adsense account baned its very difficult to reactive by google.you can use your relative name and give the address that you gave your banned account.