trace down that clicking noise. it's probably a relay. if you find it and it is a relay check all the powers and grounds for it. Make sure you have a good battery voltage and your battery is more that 12 volts. it sounds like you may have a problem with the correct current holding down the relay.
so, does the vehicle actually start up and run? When you say dash lights do you mean the dash illumination lights or are you talking about security
light? Are the outside parking lights or headlights flashing too? Do you have an aftermarket alarm? Factory security?