Profile: unity

We are going to buy "nop Pavilion theme" and we want to know about something before that.

1. Once we buy the theme, should we pay more for other required plugins ?

2. Can we take theme with demo data when we buy the theme?

3. How is the supporting for issues? or bugs or etc. ?

4. How long is the license valid?

5. After expiring that license should we renew other plugins which are come with the "nop
   Pavilion theme" ?

Thanks & regards,
Sameera