a few short basic questions

[Connie]

welcome here!

I suggest you start to read the WIKI, many answers are there!

1) On installation, why do I have to enter my email adress?
because GS sends you the logindata after installation

2) Where is my email adress stored?
in the user.xml file

3) How is the email sent? Are the informations transmitted to getsimple servers and sent from there?
no

4) After copying GS to a directory via filezilla and setting permissions to 755:
Are other files changed outside this directory? for example the main index.php?

read the wiki how to move an installation

5) Is editing one page by multiple users at the same time possible?
test it. no

6) Is adding pictures to a page possible?
why not?

7) is it possible to see all editing by users in real time? Such as on google Docs?
no, get simple!

8) Is editing with iPads or Android devices possible?
all editing is done in the browser, so what?

9) Is it possible to sort pages and files in folders?
you can have multilevel menues, pages as subpages of other pages, that's what I think you want to know
but GS stores the pages in the data/pages-folder (which is not relevant)