Yes, too many items is free :)
If you can play Minecraft then you can install the Too Many Items 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
Only Server OPS can use mods like Too Many Items.
No, You cant
press "o"
no
Yes
TMI/NEI (Not Enough Items) (Too many Items)
Yes
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.
Valid Size