Pick one, sign up and transfer some cash.
Pick your stock and click on "trade"
Like Kelby said - find an online broker like TD Ameritrade, sign up, transfer some money and buy the stocks.
I know some people might actually want to buy the physical stock certificate. You may have to go through an actual stock broker in person to do this & it won't be cheap (with his fees added in). I've seen some people do that & frame the stock certificate as a birthday or Christmas gift.
seekingalpha.com find out if the company sells directly. if not you have to find a broker who sells odd lots. i would stick with one company and follow it in barrons, wall street and forbes.
i am looking to buy six shares but not in the one company two shares in Bridgestone, two shares in bmw two shares in Lexus, how do i go upon implementing this, do i go through my back or what do i do to get things running ?