No, not as of March 27th, 2013.
Not in the current version, at least not often.
There are 3 sizes of slimes in Minecraft that naturally spawn. Big, Small, and Tiny.
Minecraft: Pocket Edition was updated to version 0.6.0 on January 30th, 2013.
You need the full version
Yes, it's called minecraft pocket edition. There is a free version and a paid version.
As of Pocket Edition 0.3.0, cows have been part of Minecraft Pocket Edition. If you have that version or above, then there should be cows.
The flat world seed spawns alot of slimes. But every seed spawn slimes.
In the paid version yes.
you cant.
In the minecraft pocket edition you cant get seed because in the computer version you get seeds from tall grass and there is no tall grass in the minecraft pocket edition
Not the PC version, but you can download Minecraft: Pocket Edition on iOS and Android.
minecraft: Pocket Edition Lite is the free version of Minecraft: Pocket Edition, available in many app stores like Apple's AppStore and Google Play.