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Oh hey, so I've neglected this for a few days.
At 11.8 the battery was either toast or needed a full charge, not a boost. Either way something needed to be done about that. It could have been "eliminated" as a possibility with a boost, but once the car ran, it would have been the next step (relying on the alternator, you'd need to drive all day to recharge a battery that far discharged)
Now, since it doesn't crank, use a jumper cable to hook the crankcase to the battery negative, if it cranks you've got a busted ground wire between the engine and battery. If it doesn't crank, go down to the nearest auto parts store and grab a cheap 12v test light (if you dont' have one). Put the clamp on the engine block and use the pointy bit to poke the bolt with the big wire on the starter. Is there light? Yes = next step, no = issue between battery and starter. Now use the pointy bit to poke the terminal of the small wire while a helping hand sits in the car and cranks it. does the light turn on? Yes = bad starter, no = electrical issue between the key and starter.
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