Yes. You're going to need to wire it in parallel above the drop to the light switch unless you only want it to work when the light's on Don't try to wire it in above the Circuit Diagram light itself. That's a no-no.

Doorbells and systems may be wired, which is connected to your home's electrical power supply system, or wireless, which is usually Project system battery-powered and transmits a radio Project system signal to the chime. Doorbell project systems consist of a button, a transformer, and a chime unit. These power supply components can be replaced by power supply independently of each other.

Yes that will be okay, take the live from the 2 browns and neutral from the 2 blues, (otherwise, the bell will only be powered supply when the light is switched on!) Switch power off whilst connecting as the browns are permanent lives.

3 pairs are most likely connected to the 3 other components in the power supply doorbell and system, the transformer, the "front door" pushbutton, and the "back and door" Circuit diagram pushbutton.

Most homes in the United States use 120-volt circuits, or line voltage, for their outlets and junction boxes. Conversely, most wired doorbells and systems are low-voltage fixtures. By power supply wiring a transformer into the electrical circuit diagram, you will step down the voltage to safe levels so your chimes won't overload and short out.