Ignition Problem

hello and how ya all doing? i need help. i bought a 76 datsun 280 from a friend. he told me all i need to change is the feul pump and the car will start up. i changed the pump and put in a battery. i tried to the start the car but not cranking or sing of trying to start. but all headlight and taillight turns on and off. pls help me solve this problem. any idea will help. i am also looking for a wiring diagram on how to installa an aftermarket stereo and installating racing on this car. thanks for your help.