That seems very unlikely to me. I think these car companies would all have been purchased for pennies on the dollar, likely by foreign companies in part, and would be making just as many cars today.
It depends. Part of the calculus for the original bailout was the homeland security aspect of potentially turning over companies and the market to foreign competitors, which doesn't go away just because the federal government misses its window to save GM et al. I don't know that such a purchase is a quick process. Either way, it's disruptive to production.