I would not waste your time with the IT manual - you get what you pay for. You're not likely to find much of any instrument cluster troubleshooting info in an IT manual. There's a reason the factory manual is easily 20 times thicker.
Brakes should kill the engine easily, unless you're in low gear. Speedo issue is likely a sensor or wiring problem. Ditto if the air cleaner light and trans temp light are always on as well.
Fix the warning light issue and the chime will stop. I would not disable the chime, as you will need it to alert you if something bad happens.