Could be a few things. In my order of likelihood:

1. Drive belt snapped (could be the belt, but usually because of a pulley/tensioner problem) causing no alternator charging to the battery, eventually battery ran low on voltage causing modules to report errors. Eventually battery got too weak to start car.

2. Alternator crapped out (either electrically or mechanically) causing above symptoms after battery couldn't support the car anymore electrically by outputting enough voltage/amperage.

3. Battery completely died causing above electrical problems.

Good luck. Hopefully it is just a snapped drive belt... but seldom am I that lucky so I wouldn't count on it.

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