The Pop Air RGB TG case supports up to five 120 mm or 140 mm fans. These can be installed in various positions, e.g. in the front area, at the top and at the back of the case.
As we do not have an effective user experience, we have forwarded your question to the Community so that it may be answered by another customer. However, the reviews speak for themselves. :)
Yes, the cable is in the tower and only needs to be plugged into the mainboard.
The fan colours can be changed using the button at the top. Colours can be set to static or alternating.
See also instructions.
I assume you mean 360 AiO cooling.
According to the instructions, 280 is the maximum both at the front and at the top.
https://support.fractal-design.com/support/solutions/articles/4000184344