Magento Experts - Help me Optimize and finish up my Magento Store

I have designed a Magento store and entered about 60 products into the storefront and would like assistance getting this page ready for launch. My store is here: [login to view URL] First - I need it all optimized as described on this page here: [login to view URL] Second, I need help implementing associated CORE CHARGES to pricing for components. For instance, many of our components are sold Exchange. So when someone adds the 22650 Transmission to the cart, it should be mandatory to add a CORE CHARGE of $10,000 that will be returned when the customer sends back their core. All of this should be clear to the enduser and explain core requirements for this part. Also how to ship these back. Third, I would like you to bid on 8 hours (1 day) of your time to help me finish launch the page. From fixing the critical errors to adding the forms to register accounts, also just finishing up all of the About Us pages (I will write you just guide me all of the missing info) and etc. I can do graphics and words, you just help me with the backend. Finally - Finding the easiest way to port this website back to the original Domain "[login to view URL]" and have that be the domain shown on top. And launching the site. I will be adding more to this website in the future, so fugure work for the winning bidder will be availalble Thank you.