Create a Shop and user login area

Hi I've got a website already that is [login to view URL] its running fine and smoothly. but i want to add some new features in it. Please find below requirements. 1. Create an online shop to sell and link in with paypal. I dont mind if you use WooCommerce but it has to work like i want it to work. 2. Users login area. where they can login and manage their purchases. edit details. like address. if you are already a member you dont need to add any details. you can just click on buy it now and pay through paypal. Unregistered users should have an option to signup but u can checkout as guest user 3. Change theme name, at the moment when u click on page source it tells u what theme you are using. 4. Change wp-admin link. and make admin login page looks better, I know its a simple project. you can get plugins to do the work. but i need a professional to work on it. Thanks