I2C with seven segment dispalys and buttons

Hi guys, I'd like to ask if I want to connect 4 seven segment displays to arduino : http://sell.lulusoso.com/selling-leads/687663/5082-7613-Seven-Segment-Display-circuit-diagram-unit-driver-Agilent.html

1) How are the wires should be ? 7 pins for outputs , 2 com , 1 for dot >> I guess every one of the 7 pins should be connected to the SDA , but what about the SCL ??

2) if it's connected correctly, Do every pin (a,b,c,d,e,f,g) of the 7 need to have ( start transmission, and end transmission ) I mean do we consider each pin as a single slave?

3)Also , how to connect a button using this protocol ? I'm really confused !!

Regards

4) To connect any device using I2C protocl ,, how can I know where to connect the SDA & SCL ? like leds, buttons , sensors .. etc

5) If I connect a button (address 1) and a led (address 2) using I2C protocol , how will the arduino differ that add1 for button and add2 for led ? especially they're connected to the same line (SDA) ?

Any Help Please ? :astonished:

I believe this is a very basic 7 seg. display (note the price). No time now but look at this: http://www.kpsec.freeuk.com/counting.htm#drivers