Take it to a dealership or good Indy, swallow their labour rate and get a proper diagnosis. The money you could end up forking out in stuff you don't need (ie the plug and coil you just bought and potentially an engine) will amount to a much bigger sum. If cylinder one indeed has no compression, you either somehow bent a valve, broke/stuck a ring, or blew the head gasket. Hope it's the gasket. But the whole thing sounds fishy to me.
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1999 BMW 328i (Daily Driver) - m54b30 intake manifold, ebay headers, Rebirth Motorsports CAI, Rogue Engineering underive pulleys, Epic Motorsports Remote Dyno Tune, Custom 3 inch exhaust with Burns Merge, Schrick 264/248 Cams
1967 Buick Skylark - 430 Buick Big Block Swap.