It is very safe. It works, and has no virus.
Yes
Yes, too many items is free :)
no
If you can play Minecraft then you can install the Too Many Items mod.
Only if you are in single player. On most servers, if you try to use commands or too many items it will say that you are not able to use that command. If it does not and you get the items you may be banned from the server for cheating.
I would use a mod called Too many items too, I have a tutorial for how to install the mod. (See "Sources and related links" below) Too many items is a ingame inventory editor.
Because you dont have Mod loader installed Google it to find out what it is
Either it enhances the experience like the aether or mo'creatures mod,or cheats it like too many items mod and singleplayer commands.
it depends what you like but the best ones are listed below: Too many items mod the Aether mod the iron man mod battle gear mod
if you mean a black screen then it means the too many items you downloaded dose not support the version of minecraft you have the 1.9 too many items
You can either your invedit a mod or you could use an in game mod called too many items
Because you probably don't have mod-loader installed. Try reinstalling it.