8,000
about 3500 songs but im not sure
well, it matters on how many songs and media you have. if you have like 300 songs and like an episode of a TV show then get the 4gb. if your have like 1500 songs and like 2 movies then definitely get the 16gb
A 16GB ipod can hold 3,600 songs
About 4000 songs
around 50.
An 16Gb iPad can hold up to 199 app and 1 video and like 580 photo
It depends on how big the songs are... apple products only hold low quality MP3's anyway so most of them are 2.5 to 6 Mb so That should give you and average of about 4000 songs but if your into rock or metal closer to 2000 but if your into pop then probably 4500 songs :)
8
First of all, iPads come in 16GB, not MB. On a 16GB iPad, you could fit hundreds of apps.
Depends on what you need it for, typically most people wont need much more than 16Gigs in the base model iPad, however some people do have extraordinary amounts of video files and music that takes up much of the space, so it depends how much you have to put on it, specifically video and music files
About 20,000
About 7000000