no
Yes spore mods do work. You can find the largest list of spore mods here: http://sporedum.net/spore-modding/spore-mod-index/
No you can't just use mods instead.
Yes. Galactic Adventures does not come with Spore, and requires you to have Spore installed already.
OSHA has no requirement for spore testing.
The website had mods on it so it was banned to prevent people from getting free parts on spore
Yes, toomanyitems does not require modloader.
Different mods require different versions.
Like others they can't be health epic to 250, only rouges, but you can use mods.
depends on what you're looking for. but most good mods in halo require a jtag. but a good site to look up mods is- http://www.thetechgame.com/
They usually require a down payment.
It allows you to add mods that require ModLoader to your Minecraft
You would require an internet connection and access to the websites that provide the Mods, If you would like to install the Mods, a copy of DoW installed on your own hard drive is required.