2010 Toyota Camry drivetrain & axles problems

I pulled into sheetz in bedford at about 515am on 01/13/10. I pressed the on/off button on the dash at which time the lights went out. I exited the car and ensured that the key fob was in my coat pocket. I spent approx 5 minutes in the sheetz store. On my way out, an unidentified sheetz customer came into the store and asked who's white camery was in the parking lot. That was my rental. We exited the store and approached the car, which was now stopped at the bottom of the slopped parking lot and near a gray f-250.

We have owned this car since new and followed the maintenance schedule religiously. The car is at 76,000 miles and yesterday I discovered that the car had burned through 2.5 quarts of oil less than 3000 miles from the last oil change. Additionally the slave cylinder is leaking after the transmission was replaced at 23000 miles. Prior to the last 3000 miles, the car had never burned through oil between oil changes.