Hi,
My name is George. I work in the E-commerce business and I would be happy to help you out with this project.
I have a Google Analytics Individual certification and my main area of expertise is third party integration.
First question that I would like to ask you is who is the third party E-commerce solution that you are using? Depending on this, the integration can be a lot simpler.
Most of my last completed projects are GA integration with third party shopping carts. I've done integrations with Avangate, DR, Cleverbridge, BlueSnap(Plimus) and other smaller e-commerce prividers based in US.
Also, for the second part of the request, I can help you set up events and goals throughout your website and also the shopping cart, if the Shopping Cart provider offers JS/Html editor.
Looking forward to your answer.
Thank you,
George