Unfortunately you can’t use Smart School as SaaS or multi school application. Even you can not edit or customize Smart School to make it SaaS or multi school application due to its licensing terms. Smart School licenses are single end products, additional information for licenses can be found here.
After adding staff or student if no email is receiving or there is no any email send by system then your email setting is not configured properly so system is unable to send any email. To configure email please check this article.
No, currently unicode characters for non English languages does not supported in data export from table or datatable.
Unfortunately not, the PDF or exported documents are only generated in LTR direction.
Yes, Smart School support RTL direction for languages.