This just isn't true in any way. Uber once upon a time was a bidder on Here Maps, which provided most of Bing's mapping data, but they lost to a consortium of German car makers (BMW, Daimler, Audi): http://www.wsj.com/articles/bmw-daimler-audi-agree-to-buy-no...
No. I can't name a source though. Basically Microsoft was hemmoraghing money on this unit and Uber took a chunk of staff, the tech, AND the operating expenses.
$1 doesn't make any sense. Perhaps you're leaving out some form of equity swap. Bankrupt companies get purchased all the time for millions of dollars and I can't imagine Microsoft's business team would allow such a shitty deal.