Create you database in sql server by attaching mdf file. replace your database name with "your_db_name"
<add name="DbEntities" connectionString="metadata=res://*/Models.DatabaseEntities.Model.csdl|res://*/Models.DatabaseEntities.Model.ssdl|res://*/Models.DatabaseEntities.Model.msl;provider=System.Data.SqlClient;provider connection string="data source=localhost;Initial Catalog=your_db_name;Integrated Security=True;multipleactiveresultsets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />