Here is the data sheet for the 7-segment displays:
http://www.us.kingbright.com/images/catalog/SPEC/SA18-11EWA.pdf
Those LEDs take over 7.5V to drive - do you realise this? The common anodes will require a driver circuit each that takes logic levels up to the appropriate supply voltage (9V would be an obvious choice). LED displays compatible with 5V are much simpler to drive.