Yes I think you can.
Yes. Simply click the Movies tab in iTunes and drag movies into the window. Note that they must be MP4, MOV, AVI, or any other quicktime-compatible format. When you connect your iPod touch, your videos should (assuming you haven't told iTunes not to) automatically sync your videos between your iPod and your computer.
On the iPod touch you have to have an app to text if you do then your app has a number
No the touch has its own updates. =]
Yes you can take pictures on the ipod touch 4 as it has two cameras, one on the back with a lower resolution camera on the front for video chat and photographing your own face.
Yes, an iPod Touch can crash. Though not normally on their own (but they can do it on their own), it is usually because of faulty equipment working with the iPod that makes it crash.
yes you can downgrade your ipod using programs you download from the internet (they all have there own instructions)
An estimated 30 million people own an iPod Touch worldwide.
I own an iPod Touch and yes, it does have multi-touch. Apple doesn't like to make any touch screen without multi-touch.
No, you do not need a Mac. Apple will sell you an iPod Touch regardless of whether or not you own a Mac. Plus, the iPod Touch works fine with the PC version of iTunes.
You can not watch any tv shows or movies on the itouch unless you buy the movie or show on the iTunes store or make your own movie
is it from your pictures or drawings?
On an iPod touch, only the newest model has a camera. If you're using an iPod 4th generation, just open your camera app to take real-world pictures. Using any other iPod touch, the only thing you can take is a screen shot. To do that, you simultaneously hold down the power and home buttons for a second or two, then let go (screen shots work on all iPod touch models, if I remember correctly)