Yes
yes as soon as you've downloaded the mods you can play the mods while offline.
just play minecraft
The PS3 will not play PC games and PC game Mods will not mod a PS3 game.
You are not able to at all without the use of mods.
Yes But You Will Probably Get Banned
you cant unless you have mods
you must play all day for the rest of this year to get them ....... without... mods with mods it shouldnt take more than a minute or two ......
You can't make a "single player just for mods." All of your data is stored in the exactly same place and mods affect every single world. If it is a mod you can turn off then there is your answer.
no only the older machines can play the games
Yes, you can install as many mods as you want as long as they are compatible with each other. Some mods use the same .class files which basically means they aren't compatible. You will know if two mods are compatible with each other because your game will give you a black screen and you won't be able to play until the mods are deleted.
Don't play COD.
No, but there are some mods for the PC skyrim that might let you play as adragon.