I'm pretty sure there's several users who would love to help put this guide together, myself for one. The problem is TF is changing, sometimes dramatically, with each version. Personally I would be happy to stay with TF102 and build a guide, even do a video for it. All the basics, show people around, where to do this and that, then how to FTP or zip and all the little things that effect all of those tasks - but - I am hopeful TF13 (when we get there) is more like the vision that Flynn has been working toward all along - which will be another very different beast to TF102 and possibly different to TF12 (current).
I agree completely a video is SO much easier to follow than printed instruction, or even photos with explanations, but very few of us have the time to make one.
I found the screencasts on the Themeframe site very helpful when I was a first time user. They may not cover everything, but they do show how TF "works", and are relevant to TF102 pretty much. Im not even going to comment on TF12 because I havent tried it, and while my curiosity is slowly getting the better of me, I am trying to hold out until we have a version closer to Flynns goal, which I am very happy to do.
If you read the Quick start guide I started in the Themeframe Members forum, then have another look at the screencasts you should have a very good handle on TF.
I would strongly recommend new users only install TF102, it will pop out beautiful themes. I have not seen any advantage to using TF12, but many disadvantages (another duplication of files and folders, coding required to get layouts you want, much more complicated to "use" for a "non-coder") so I just cant justify to myself going through a TF12 install at this point.
Where are you located? Got skype? Im sure you will get a volunteer who is willing to talk you through getting up and running. I'm only volunteering for TF102 though
PS I doubt very much you have been "banned". If you dont have access to TF Members forum but are financial TF user send a PM to Larry, Juggledad or Flynn and that will be fixed.