It's neither good, nor bad.
yes you do.
16 Ohms. Yes 16 ohms in series. 4 ohms in parallel
No. Two 16 ohm speakers connected together are either 32 ohms, if wired in series, or 8 ohms, if wired in parallel. You can, however, connect four 16 ohm speakers in series-parallel to get 16 ohms, with four times the power handling capacity of just one.
All things be equal, the 24 ohm will be better. The reason is because they'll be many times louder decibel wise. The 24 ohm headphones can make your eardrums bleed if connected to the right source. 16 ohm (if you can find em) on the other hand will blow your head clean off. If you plug the 63 ohm into most sources you'll probably find the volume level inadequate.
The impedance of the headphones is too much for you laptop to handle. Your headphones are probably 8 ohms. You need to get a 4 ohm headset which pulls less power.
There is no single standard. Many computer speakers are rated at 8 ohms while others are 16 ohms or higher. My computer subwoofer here is 4 ohms.
I left my headphones right here.
Yes. The headphones are good. (P.S: I doubt anything by Gaga isn't good lol)
no
yes, the headphones good for late at night when others are sleeping
Apex headphones get good ratings for comfort,but that would be an individual opinion.
The nominal 8 inch speaker impedance can be 4 ohms, 8 ohms or 16 ohms. It depends on the make of the loudspeaker not on the 8 inches.