Use the bottom right button to display the trip counter you want, then hold that same button up towards you for two or three seconds to reset to zero.
Here's the owner's manual: download/file.php?id=3585
What do you mean by remapped? If you mean a faster program for the engine control computer. your choices are going to be slim. RRM made a computer upgrade module, looks as if they still have some left: https://roadracemotorsports.com/store/
Keep in mind with ANY reprogramming of the engine control computer on ANY car. The factory engineers spent thousands of hours writing these programs and the end result is a careful balance of performance, efficiency, emissions, and reliability. There's a small safety zone built in to each factor to ensure reliability. Any reprogramming to improve on any one of those factors is either robbing from another factor or eating away at the safety zone. There is no free lunch. If you could simply turn a knob and get substanially better performance without any downside, then the factory would have done that and advertised the car as having more horsepower. If you got a car with the CVT automatic, it comes with the engine detuned to deliver 5 less horsepower. This is to reduce strain on the CVT, which is already a dodgy unit. Obviously the engine can be tuned to make more power, but what is the long term effect on the CVT, which people are having trouble with in stock tune? What if doing that makes the CVT blow up at 80K miles instead of the 130K miles that some are experiencing already? No one repairs them and a new one costs $5,000, if it blows then your car is junk. Anyone can reprogram the maps to get more power out, drive it 10K miles, and start selling them. But has anyone tested it for 100K miles?
"Your mileage may vary" has never meant more than it does in this situation. With an abandoned car model it's a risky proposition.