Yeah, it was my understanding that today's TVs had calibration built in and that they didn't need this. That said I'm a beginner and still learning.
Not calibration usually, perhaps unless you can get into the factory service menu - and you don’t, and shouldn’t need to.
But using a calibration disc can really help. You’ll probably end up turning down the brightness, if nothing else. When they come out of the box,most Tvs are set for store display, which is way brighter than you’ll probably need at home (depending on the light in your viewing room).
Cheers,
Jim
TVs out of the box are often set on what is derisively referred to as "torch mode". The brightness and contrast are boosted to give an appearance that everything, whether shot on film or not, looks like it shot on videotape or is being broadcast live. Some people also call it the "soap opera effect" because films look like soap operas rather than film.
IMO, a well calibrated TV should display on its screen on the viewer's end the same thing that the program creators saw on the transmitting end. You can make your TV picture look like anything you want. You can turn everything green if that's what you like. I just want mine to faithfully display the programming as the programmers (film makers, producers) intended.