2.How do you control the volume on these?
Buttons on side
3.These headphones do work with iPads, correct?
Yes.
4.Would these be ok for 11 year old girl?
hello it will be no problem. it will fit 11 year old girl. the headband is adjustable.
5.Is there a way to add a microphone to these headphones?
It can be wireless with the Bluetooth or connected with a cord but no mic hook up
6.I lost my charger to these and can’t find one to fit. Do you know what type of charging cable I should buy?
A micro usb cable should fit.