Build eCommerce integrated with Filemaker -- 2

Hello, Here is the scenario: we use an ERP system that is based in Filemaker. It has the ability to integrate with few carts including magento. Now what we would like to do is: 1. Integrate our products & customers which we will enter in our ERP with eCommerce site 2. Display suggested items 3. Display quantity box having + & - to increase and reduce quantity 4. Slide show on main page 5. slide show showing related products 6. when clicking on "add to shopping cart" not to redirect to shopping cart 7. have a widget on a way that we can add optional items within a description of another item. Example if a customer is looking in the description of laptop to buy, we want to be able to show options to add memory upgrade and another option to add hdd upgrade. [login to view URL] want to be able to show randomly "Sold "such an item" to a customer from QLD 9. We want the look and feel of the website to suite IT. 10. I want to be able to create promotions for example when the customer spends $$$ it will pop to them saying if you spend $50 more you will get this other item free. This needs to be done by us in an interface 11. "recommend to a friend" button on all items 12. We want ability to create discounts and coupon 13. We want to be able to link inventory items (not all by default, we want to be able to choose) to our ebay store 14. Ability to list ebay items at a different price than online store 15. More requirements may occur