Installing rear view mirror back up camera and fake alarm led

i am planning to install 3 devices in my prius.​

A back up camera , back up sensor and a fake alarm.haha yes really​

The back up rear view mirror needs a the positive for a acc fuse and black ground , the fake alarm needs a constant power and a acc power source​

I guess the back up sensor would be connected to the reverse light.​

1)Anyways , since this is a hybrid i dont know if i need to disconnect battery before using fuse taps on the fuse box, and if i disconnect the battery would i need to do something to reset the car.sometime when you take disconnect battery the car wont start , with hybrid i dont know. Or if disconnected just reconnect and everything should be good.​

2) what are good examples of acc fuse , power that only when the car is turned to acc or ignition. ​

3)what is good choices for constant power , like hazard lights, dome lights , radio (maybe) . just want to know so i can use a fuse tap to those fuses. and after that i wont be able to put the cover back on , and if thats ok.​

thanks​

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