Okay, I guess I figured it all out. So right now I have the following setup-:
1 Arduino Board with Wireless Proto Shield (switch in Micro position) and XbeeXBee hooked up via DC jack pin, sends data to serial with Serial.print(variable) where variable is a predefined char array. The other setup-
1 Arduino with Wireless Proto Shield (switch in Micro position) and XbeeXBee is hooked to the PC via USB and with Serial.read() i'mI'm able to read data via the Serial Monitor. No configuration required what so everwhatsoever, the only thing you need to do this is to uploaddeclare Serial.begin(9600) to both boards.
So it's true that I can't use Arduino and XbeeXBee at the same time, but this still works for me to solve the problem I had.