1. in WFO as many as your computer has cores

2. don't think so

3. it does, there exist plugins and you can develop some on your own, even automize clicking the web

4. you can install them parallel, which makes no sense

5. yes, you need multiple instances, you need Zorro S for using Zorro S features

6. from your broker

7. generate maybe not, but develop

8. it is script based, so there is not really an "UI", Linux more likely not, since it is a Windows tool

9. depends on your skills

10. where is the difference?

11. partly yes, partly no, see 8.