My gigger and daily driver year-round is also a Scion...an FRS (also known as a Toyota 86 or Subaru BRZ .. all basically the same car, designed by Toyota and built by Subaru). Rear wheel drive, 6 speed manual, an absolute blast to drive, and gets almost 40 mpg on the highway, and never less than 30.
The back seat (which is too small for adults anyway) folds down flat, with access via the trunk or side doors, and it holds an amazing amount of gear, which was kind of a surprise. When I bought it, we figured I could just use my wife's Land Cruiser for gear-heavy gigs when necessary, but haven't needed to. My piano rig consists of a Yamaha P120 (88key weighted action heavy keyboard), Acoustic Image Coda and Genzler Acoustic Array Pro amps (I take both to most gigs), large X-rack, bench, mic stands, milk crate of cables, power cords, pedals, etc., large bag of spare cables, mics, etc...and it all fits in easily. Plus...no room for a passenger, so I get to enjoy a little solitude! One band I play with also requires me to bring a trumpet, a flugelhorn, and a violin in addition to the keyboard stuff. No problem.
I can also fit a DB in the car. I don't own one, but I've done it in two occasions. Fully recline both front seats, load the bass bottom-end first from the passenger side, rotate bottom towards the back of the car while guiding the neck and scroll into the passenger footwell. Once in place, pad where necessary to make sure there's no weight on the neck, put the driver's seat back into driving position, and you're good to go.
I've put almost 130k miles on it, and she still looks and drives like new. When the time comes, I'll probably just get another one. It'd be the only time in my life I've ever bought the same car twice (except for two Fiat Spiders....but that was different....the two of them barely added up to one car).