I have used Entity Framework in Visual Studio 2012. Build entity model by \"reverse engineer code first\".
But when I setup Visual Studio 2015 just now, and setup EF
You can simply follow this 2 step-
Download the file from here.
Follow this video tutorial (please run code snippet to see the tutorial) -
More can be found here (written tutorial).
If any problem of viewing the tutorial, please follow this link for tutorial.
I think, this is enough for installing and it will solve your problem :)