I would start with the throttle.
Maybe we could start with the basic hardware for the Arduino (I don't even know which one or which kit to get)
a display (if android readouts are too difficult for the beginning)
and some sensors (temperature, hal sensors for speed and crank cadence, maybe a photo sensor to automatically switch on the backlight when it's too dark)
Is this, what I should buy?
I'd rather have everything I need to start out and not start buying more stuff in 2 weeks.
Can this Uno handle all the sensors and outputs that I want to do, or would I need something bigger for that?
Is Saintsmart the company that makes them or are there other options?