Understand what are the requirements for the project needed and then start the development and let me know where you are stuck. After understanding the requirements start the db design and the continue the front end development. Ofcourse we are here for you to help :)

WCF still have a future. If we are creating restful services ASP.NET web api is best choice. If we want to develop soap service we should use WCF

Can you please tell me a sample format of username and password. Most probably it will be the issue of authorization. It will be happen when the username and password is correct or the user trying to access have no permission to access that server.Also try to pass username without specify domain.

You can follow the same steps in that video. The only changes will be the syntax. You should change aspx syntax to razor. can you provide me the youtube link you had tried? also let me where you are stuck. So i can help you one by one.

try this link http://www.entityframeworktutorial.net/[^]. one of the best site give all about Entityframework.

Please check whether model collection is empty or not

It depends upon your requirement.What are the functionalities you try to achieve through webservices?

from where you want to consume the service? from the client you can send an ajax request like below

var jsonStr = JSON.stringify(reqObj);

$.ajax({
type: "POST",
dataType: "json",
url: "http://localhost/MyService/PostSomething",
contentType: "application/json; charset=utf-8",
data: jsonStr,
success: function (html) {
alert(html);
}
});

From the server you need to send an HttpWebrequest

Manually edit sln file

First You need to nuget. You can download from here http://nuget.org/[^] After install this Opentheproject >> VisualStudio >> Tools >> LibraryPackageManager>>Select Package Manager Console from the command window type the command for the package you want to install such as Structuremap,EntityFrameWork etc.The command you got from the link that i have provided earlie

You can install Install ASP.NET MVC3 from here http://www.asp.net/mvc/mvc3[^] Install EntityFramework via Nuget. For more go through this link http://nuget.org/packages/entityframework[^] Install StructureMap via nuget.For more go through this linkhttp://nuget.org/packages/StructureMap-MVC3/[^]