Airline fare consolidators

We are planning to open a travel agency in SW London. We are new in the business. We would like to have some information about how to set up a travel agency. Where we can buy Amedeo software to make bookings on line. And also where we can order the tickets for our customer, any information about web sites for airline fare consolidators. Or telephone contacts for example of like big travel agencies(whole sellers. Thank you, Omar
Munye Omar