Oscommerce Improvements to Product Info, Basket, Admin Section

I currently require an Oscommerce expert, I have the following responsive Oscommerce site: [login to view URL] I would like to add the amendments you see in the attached document. And these are highlighted below and all these changes must be built in a responsive way so they appear perfect on a Mobile, Tablet or Desktop. Add into Product Info Screen: • Drop down for number of adults/students/children • Add in Travel date – these need to be defined by each product within the Admin Section. They can use the drop down or the calendar button. Dates not available cannot be selected or don’t appear in the dropdown. • Tour prices updated as number of people updated Admin Section Improvements • Add in dates of week that tour runs, add in to and from dates and add in exclusion dates. • All tours can only be booked 48 hours in advance, they cannot book today or next day. Basket, Confirmation Email Tour information carried across to basket must be: • Tour Name • Tour Date • Number of Adults, Seniors, Children • Tour Price