Opencart tweaks

Hi,

Please give me an estimate on how long it would take to deliver these tasks and what the cost would be. I have provided screenshots of the work that needs to be done.

The website can be accessed from http://www.unwiredgadgets.com.au/index.php

Tasks:

1. Fix opencart ajax live search.
2. Move the "Welcome to unwired gadgets" section up to the top of the page so that is in between the menu options and the sliding images.
3. When going into each product page, The subcategories section appearing on the top appears. I want this to only be visible via a checkbox option in the admin section.
4. Add promo girl image to the top of the banner. Make the modification to the template so she appears on every product page. The temp image to use is here: ../image/data/promogirl/promo55.jpg
The size of the image will be 346x346
5. Need the one page checkout module to be linked to the shoppica theme colours/fonts etc. If this is too hard to link, making this page look professional without linking it to the shoppica stylesheet is fine too.
6. The "Login" and "Continue" buttons on the checkout needs to be updated so that it reflects the rest of the website's design.
7. Any other recommendations and suggestions are welcome (extra modules etc that are quick and easy to implement and provide bang for buck).