complete a website: shipping costs, currency exchange

Website is mostly built but I don't have the time to fix everything up myself. Website created in WIX. Website is: [login to view URL] I want to add the following; 1. Australia post calculator – domestic and international (to include the reduced rate we have through Business 250). Cost to be included when going through check out. 2. Postage calculator button on shopping cart page to determine costs prior to going through the checkout. Should cover domestic and international postage options at the rates in point 1. 3. On the “My Cart” page, delete the paypal button and only have “checkout”. Once you press checkout you go through the 3 stages of purchase (1 – shipping address, 2 – delivery options, 3-payment). The options for Paypal, credit card (using Sprite) and direct bank transfer should be on page 3 – payment. 4. Is there a way we can have customers register (with name, address, email and password) when they purchase so if they return to purchase again they can login and all their details are there. They can also be sent emails of sales, new products etc. 5. “Here to help the planet one child at a time” to be written in the same font style as “Enabling children to thrive through fun, innovative, quality products”. 6. The video doesn’t work properly on an Ipad. I want it to only play when clicked on. There is no "play" button either. The music plays in a loop on all pages. 7. Change some of the photos on the home page. The video itself needs updating. 8. Update the shop page banner from “coming very soon” to "New". Also change background colour to one that will stand out. 9. On the Shop/The Quiet Book page I need a line of photos of each page as well at the video at the end of the list. 10. On the shop/The Quiet Book page I need to add a more detailed description of the book. 11. On the home page in the top corner I want a currency conversion button so customers can change all prices on the website into their currency with one click at the beginning of their search through our website. e.g. has a picture of the Aus flag to denote that all prices are in Aus $. Change the flag to US to get prices in US$. If this is possible, then remove the currency conversion tool currently on the checkout page. 12. On the Classroom of Hope page the format and font is different from the About Us and Contact pages. Please update to the same as About Us and Contact pages. 13. On the Shop page make the “Contact Us” information band in blue to be on the bottom of the page, regardless of the quantity of items for [login to view URL] needs to be consistent for all pages as it is on the Home page. I am looking to have the website completed as soon as possible. Please reply with cost, time-frame to complete and any potential challenges or issues please.