Front office using windows schedule


I am fairly new in UIPath, and me client is make some questions about license. Could any one help me, please?

These is the question:

Can we use one front office robot to run scripts using the windows scheme (without buying the orchestrator)? This would run in a server unattended.

Can I develop the scripts using the studio community edition and then only buy the front office or back office to run these scripts? Or do I have to buy the studio too?