When changing brake pads.....?

Is it always necessary to change the rotors and calipers as well?
When changing brake pads.....?
No, occationally you might want to get your rotors %26quot;turned%26quot; its just resurfacing them to work better. You shouldn't have to change your calipers unless they are old and are sticking. If they are sticking, you could just take them apart and clean em' and lube em' and put it back together but if you have the money just buy new ones.
When changing brake pads.....?
No no no. Rotors need to be replaced if they are rusted out, warped, or have grooves worn in them. Calipers if they are overly rusted or if the seals are torn and leaking brake fluid, or if you can't get the pistons to go back into the caliper. Often times you can find a place that will give you a lifetime warranty on your pads, also...
no, not unless there is a problem with one of them...
Absolutly not the pads are designed to be the parts that wear out first so unless you drove for too long after the brake pads started squealling then you shouldnt have to replace anything but the pads.
God no. Rotors last much longer than the pads. I change them once a year. Calipers should be lubricated often to get the most out of them. Once every three months, take the slider bolts out and lube with the special caliper lubricant any auto store will have. When changing rotors are required, you will know. When changing pads, give the disc a little looksie. Check for deep scores, uneven ware, cracks, all that good stuff. A common problem is one side, almost always the inside end of the rotor is far more worn than the outer side. This is due to the caliper seizing up and needs to be lubricated. Having a rotor machined is perfectly good for routine maintenance. extra notes on disk brake maintenance, if your car is a four wheel disk model, use cauting when working with the rear parking brake piston or worm screw. And lastly, know whether your calipers are actuated by a piston or worm screw. Using a pad spreader on a worm screw caliper will ruin it and then it will need to be replaced. Easy way for a $60 job to turn into a $600 job.
No, it is not.

However, for best brake efficiency, you should resurface (turn) them, which can only be done so many times until they are too thin, per the specs.
its not necessary,unless the rotors are scared or warped,or the calipers are hanging up.