Most often with me I do either the front or rear, not both at the same time. It’s just the way the rotations works, also easier for the DIY’er, spread it out.

Most have disc front & back. With older vehicles, drum in back, the front seems biased to do most of the braking.

I change them myself. I buy the pads from Advanced Auto Parts and, with the better brake pads, it is about 80-90 dollars and they always have a coupon if you order online. Just using a floor jack and stands you can do in in less than 2 hours from start to finish. Local shop wants about $400 to do it.

Just did my rears and was well into the job when I realized the kit I bought on Amazon, which was listed as fitting my car, did not fit. At. All. The rotor went on fine, so I figured it was ok, went to the local O'Reilly's to get pads. Got back and realized the rotors were a good 5mm too thick for the caliper to fit over. Back to O'Reilly's for rotors. That all ran me $300 and an hour of my time. I bought the Amazon kit long ago, so it's gonna be a battle to get those refunded.

If you're half way mechanically inclined. Watch a youtube video and do it yourself. Even if you have to guy buy a jack / jack stands + Parts. You'll still come out at well over half cost.

Places are going to charge you way over $1K to do it. You can probably knock it out for $300-$400 depending on how high you go on parts.

I did front brake pads and rotors on the 2018 Toyota Tacoma SR5 double cab this afternoon.
All the parts were ordered from Rock Auto online.

I tried something different this time, Brembo super premium rotors and Akebono HD/Towing brake pads.

No real surprises doing the job myself at home in the driveway.
The road test when the job was completed also with no surprises.
The obscene brake pulsation was gone.

The vehicle was purchased as a certified pre-owned truck from a Toyota dealership. Front pads and rotors were replaced with factory parts before delivery at about 18k miles.
It's at 96k miles now, the OEM front brake parts lasted for many miles. 78,000 miles is a pretty good lifespan for a set of pads & rotors up here in the rust belt.

This has drum brakes in the rear, the last time I had the drums off for a brakes inspection about six months ago showed the rear brake shoes looking like almost new.
Just over $200 for the Rock Auto parts including shipping, and all labor was "free" without any skinned knuckles or spilled blood.

I just did the brakes and rotors on my 2016 Ford Explorer sport. Just the brake kit was about $540, though cheaper options existed in the $400ish range. When you add brake fluid and a few other parts that were needed I was in for roughly $700. The estimates around me for a complete brake job and fluid flush is approx 5 hrs of labor which puts the dealer estimate $1,400 - $1,700 and the independent garage $1,200 - to $1,500. I have the know how to do the job, but hadn’t done a full brake job in over 25 years. I also feel the package I installed was an upgrade compared to what the dealer installed last go around.

A little over $500 an axle in Texas with new hardware

if they have an adapter for your car, the motiv brake fluid bleeder kit is a worthwhile investment. It makes brake fluid flushes so much quicker.