wordpress expert required.

I purchased a basic eCommerce site. I have uploaded the site and am able to view the site and make changes in wordpress. I need to enhance the order page, add a gallery and enhance the contact page. On the order page I need to add products->subproduct->subsubproduct selection. I want to be able to have an image for the products and sub product. Also want to be able to display a number based on the selected products. Need to add an image and a event date on the contact page. Need to add a gallery page which when clicking on the item allows the user to select an option for a quote which will pop up a page requesting Name, email, phone number # of people served, event date and automatically attach the image of the item clicked on from the gallery and have the ability to attach an image (upload and image from the customer).