I am trying to start my own internet cafe store. I have software and the computers. I need to know if anyone can tell me or suggest what type server and what type router will I need to purchase in order to make internet connections?

Also, I would like to install 4 more computers at 2 different locations from the store. I need to know the best way to connect these computers back into the server or internet connection tied to the main store. Also would all I need as far as connection equipment is a dsl line?