Sorry if I've misunderstood your question, but you seem to be asking for step-by-step instructions to build an e-commerce site from scratch. It isn't appropriate in a forum to ask for that kind of assistance.
If you need help in a particular aspect, then please feel free to post a specific question. If your question is PHP-related, then it would be better to post it in the PHP forum. This forum is for the commercial aspects of e-commerce, rather than coding questions.
Setting up an online business? Explore the pros and cons of online buying and selling here. Merchant accounts, generating sales and tips on how to convert your visitors into those all-important customers.