I want to create a web classified web portal, but I have no knowledge about how to design and development of websites..

Please help me about creating websites basic know how..
Please tell me step by step procedure in order to design and development of Web Classified Portals!
Lot of Thanks for This!

Please defined what you mean by a Classified portal?

But I can tell you that designing such a website is NOT simple and requires that you learn a great deal before even starting. This medium is not really suited for teaching you anywhere near what you would need to know.

Search with the WordPress classifieds theme you will definitely find something good to start with.