Theme Install with Data

Hi,

I m doing client wordpress projects.
But when i give wordpress theme to client then it will not looking complete after active by client.
Because of post and widget and page are not add from backend. once they add post, page and widget as i set with code then it looks batter.

But i want that when theme install so, all menu , data , post and widget are automatically install with database in admin.so frontend looks batter.

SO, How it is possible?

If any one have Ans so please reply and Help me.

Thanks
cristopher