I recently was given an iPhone8 running Apple's iOS mobile operating system - do you use one?
Nope I'm an Andriod person. The phones are so much cheaper and I think easier to use!
The interface for the iPhone is built around the multi-touch screen with virtual keyboard -is the Android different?
Not really... I think the two operating systems are the same. 
It seems Google has also developed Android TV, Android Auto and Android 
They did. Google has developed a lot of things. They even started the company that made Pokemon Go!
My daughters really enjoy that game!  Is Android able to take photos, play music, send email,text message, etc.. just like the Iphone?
Yup! And Android is a lot more developer friendly so there are a lot more apps for it. 
The Apple App store has more than 2.2 million apps, so Android has more?
I think so... There certainly are a lot of them!