My friend's car keeps dying., Need help. Options

[ExSane]

Hey guys. I'm sorry if this isn't in the engine forum. Becuz his car isn't a 6gc nor a Toyota. But anyways, while we were driving around his car would sometimes stop revving and would drop all the way down to zero RPM (keep in mind that a check engine light comes on after his car warms up and idles). He tried to gas it but it doesn't work. After that, the car just suddenly dies while we're driving. We try to turn the car on but it's having a hard time turning on. We pulled over to the nearest gas station and check the engine bay. Everything seems ok. But then I noticed a big ass leak on the floor. I don't even know if it was from the car or it was there before we parked. But I kept it as a note becuz it looked like radiator fluid on the floor. So I concluded it was over heating (his temp gauge doesn't work). But he thinks its his ignition coil and distributor and spark plugs. Has any of this happened to you guys? Please help. Much is appreciated. Thanks.