240SX help? Trouble starting?

I’m currently looking at a used Nissan 240SX S13, and I’m tempted to buy it, however the guy says and I quote, “- Also, will not turn on without first jumping the car with cables attached to the starter solenoid. I have tried to find what it is exactly it needs, and I think it is a Clutch Interlock Relay switch.
I am not a 100% sure though.” The guy says the battery is dead as well. Any ideas?

Thanks,
Mike

The battery is probably dead due to repeated power drains killing the battery. If you are a handy guy figure minimum clean and check all connections, and be ready to trace battery drain. I would give at least 1k below a running car of the same vintage to allow for time and troubleshooting. Your call! And as always have it checked out by an independent mechanic before purchase.