Design page of sales

I want to take my company to the Internet, the idea is to get to be a giant like and bay or amazon, but, to begin I need a page commerce in line to publicitar and to sell my products and services, with cart of purchase, methods of payment credit card, cash and option to include the banking methods of my country (Colombia). The products that handling are as much digital as physical. I want to be able to make national and international shipments. Thank you very much.