No the iPod Classic doesn't have built in speakers. The latest model of the iPod Nano does though!
Yes. Every iPod touch has built in WiFi.
The iPod Touch does have a built-in Wi-Fi receiver, but there is no such thing as 'built-in internet'. Only the iPod Touch has a Wi-Fi receiver of all the iPods.
no only ipod touch 2g and 3g have built in internal speakers
built in headphones
Yes there is an iPod Touch with a built in camera. It even has facetime and you can record videos on it.
Ipod nano 6 gen does not have a built in speaker only nano 5 does
No, the official specs from apple state "Built-in speaker" (singular).
Only the 5th generation of iPod Touch has a built-in flash.
The newest generation ipod nano has a built-in camcorder
It means it has a built in speaker inside the iPod..
yes