Frustrating SQL Server and VS Express 2013 Issue
Sql Server DB verion 782 is for SQL Server 2014 and 706 is for SQL Server 2012.

and SQL Server 2014 will support all the previous version, but SQL Server 2012 will not support DB version 782(SQL Server 2014 version)

Probably something wrong with installation of SQL server 2014 and you still have SQL server 2012 version, Please check the SQL server version 

SELECT @@version