Make my prestashop website done

Well all prestashop experts, You need to make complete my website, where only few designing workings done , functionality is need to be done. i made a combination called adult range, so you could pich wether adult or kis and then set the amount of [login to view URL] he problem was the following all tours have to be customizes as you see on the webpage because i need to know at what hotel my customers are staying,so you had to choose . First how many adults, set the name of the hotel and add it to the cart,then do the same process for kids and infants and this can be a little annoying for customers but that´s not all, all my prices are tax included when i set the price for the kids (lets say 50usd) is displayed a price like 45usd on the page and when added to the cart it displayed [login to view URL] confuses people, so i thought the better way considering the situation is to make "an applet" (i wouldnt know how to name it) to just set the prices for adults and kids .Infants are always for free but it is also important for me to know how many infant will be on a certain [login to view URL] would help a lot , because when i get a new tour i wouldn´t have to contact you everytime. And make paypal integration with the my own servermodule to schedule all orders. Thats it .