depends, if your server is basic you'll need modloader for mp and other plug ins installed in the minecraft server jar (others should be metioned with the mod, and you will also need the mod in singleplayer installed, that should work, for bukkit it should be the same procceses for some for installing mmods in the jar and adding plug ins.
Check out the link below for a guide of how to install mods in Minecraft.
minecrafts popular servers are pixelmon mods
Depends on your server host.
Yup.
If you are looking for a easy way to install mods, someone made another Minecraft that can be used for downloading mods easier.
The Server has to install the mods Not You.
Check out the link below for a guide of how to install mods in Minecraft.
It might not be out yet but it should be. You have to download and install forge then you can install mods by going to .minecraft/mods and adding a mod there.
Yes, mods are meant to be installed client side before playing on a modded server. What you may be refering to are plugins which are like mods but are made for servers only.
minecrafts popular servers are pixelmon mods
Google for Modstallation. You can use that software to install mods.
you cant
Depends on your server host.
any will load mods onto minecraft but the better operating system the more mods you can have
Yup.
There is no way for you to become Dinnerbone but there are mods or servers that allow you to disguise as him.
If you are looking for a easy way to install mods, someone made another Minecraft that can be used for downloading mods easier.