Interactive website required

I am looking to make a website like [login to view URL] It includes the cost tables and interactive pages. I require the back end for admin to change the pricing tables and the front end for the customer or employee to get the price quote. I will require you to give the source code as well. I shall be able to host the website on a commercial web server or to host it on my own server to restrict its access to the Local Area Netwrok only. This I will decide later In order to understand that you know and possess the project skill Please answer a few question: What type of website it is? What skills are required to make this website? What tools you will use to make the site? How many pages are there in this website? How much time you will take to complete the webiste What will be the payment structure? How you will make this website, especially the formulas to calculate the price? Regards maxsals