I will try to answer your questions as I can.. the other support moderators can fill in where I can not
2. With membership, you can download the demo which includes all extension, or download template separate and extensions too.
You can choose between joomla versions with templates and extensions..
4. Please be more specific here..
5. We can not help you to restore things that might get messed up, but we will help with everything related to helping you to find positions, adjusting the template or if you would come across any bugs related to the template (no 3rd party extensions).
We do not help customers with custom work on the templates, so if you plan to change the template a lot, it is recommended to use custom.css file which is included, where you put your css overwrites, so they wont get overwritten when you upgrade.
Support is here to help