My digital speedometer in 2015 subaru crosstrek does not work

Look under the seat for any object that is jamming the seat rails.

The car has a brake light circuit powered transmission Park shifter lockout solenoid, so if the brake lights are not working when the pedal is pressed the car will not come out of park. Check the brake lights first. Also the owners manual should have a set of instructions to bypass the part lock, it varies with each car but some you turn the key to just short of the on position and wiggle the shifter while doing that, others there is a button hidden on the shift console

I, feel sorry for you, after reading your problem, but don't worry you visit the Reliable-Store they will help you for sure.
Subaru XV Crosstrek 2013 2014 OEM Factory Service repair manual

Have a key fob? if so, lock it down. Open it with the fob. This should disable security.

Not exactly sure if it has relay, but your fuse panel should be in the engine compartment and the blower motor Resistor, which controls the speeds of the motor, should be right by or screwed to the blower motor itself under the dash on the passenger side.

Yes that is normal, Subaru failed to tell customers of the oil consumption, if you go to your Subaru dealer they will fill oil to level & tell you to come back in 1200 miles time, they use 1quart every 1200 miles

Check owner's manual.

Alas, there is none. What a silly thing to omit. The closest you will get is that when you are looking at the center display (between the gauges) and you see the speed limit sign- you will notice a yellow box around the speed limit. This means you are exceeding the posted speed limit.

if the fan spins on only one setting then it is working and the problem is in the resistors( burnt out) or the control module (replace)