Advanced Search for wordpress / custom changes

Hi Team, I'm working on a website and I need some assistance. Here is what I need done: 1 - We would like customers to be able to choose their car model on the homepage so only products relevant to their car show on the website. If the customer has not chosen their car, but they click a category, it should come up with a pop-up asking them to refine their car. It should be refining products by: Make, Model, Variant - but not all 3 may be selected by the customer i.e. they may only select Make. It should show on the top banner what car they have currently select. 2. Next to the logo on the header if should show our phone number. Under the phone number, we would like our Open / Closed widget which says if we are currently open or closed. We have this widget and is currently visible on the Contact page. --------As the site is currently loaded on a test domain, I need to know of the changed files so I can copy them to the live site once ready. I have uploaded a mock up to help demonstrate what I'm asking. Please confirm your 100% understanding in your proposal. Regards,