It's a small-framed pistol, made of steel, colored black, with brown plastic grips. The barrels are ususally short and stubby, about 2 inches long. But longer-barreled models were made.
There are many pictures of them available on the web if you search around for the images.
35-100 USD
50-150 usd
A google search will bring you pictures
Looks like a Winchester saddle rifle--lever & hammer
Ruger's website lists the current offerings.
They're all potentially lethal. The deadliest component isn't the firearm itself - it's the firer. A capable shooter with a .22 has much more potential lethality than an incompetent shooter with a .50 cal.
5-130 USD or so
yes all bullets can exeplode if not look after
Uh, we don't use 22 caliber rifles for training anymore, they're kind of obsolete. The closest thing I can think of for you is a winchester, but it doesn't look like an M4 series..
What you like.
No
No