I'll go ahead and give your questions a shot.
I don't think there are any missions in Legacy of Kain. We're a multi-fandom organization, but there are many, many fandoms without any missions for them at all. Heck, even major fandoms like Teenage Mutant Ninja Turtles are not represented at all. However, there is a way to fix this: write one yourself! However to do that, you need permission. If you are not familiar with the permission process... Actually, I'd wait a bit to familiarize yourself. We're in the middle of changing it, you see.
Painless way to use the Board? Nothing more then what you probably already know. You can use HTML tags in posts, to bold, italicize, strike through, and much more. Other then that, either make sure you're logged in or enter your username every time you post. Funnily enough, just entering it manually each time is, in a way, easier. The log-in feature is a little buggy at times. Just so you know.
Oh, thank goodness. The paperwork is really quite extensive, utterly massive it is. Normally, the Spies just write up a basic report that can usually be boiled down into OH GOD WHY, and sent to Agents to be killed. However, with a particular Time Lord agent insisting on all paperwork being filled and filed properly, we have to do things proper. Now, if you get started on filling out form MST-3k, I can wrap up with R1-ff and SP0-rk.
However, before you get started with that, I have to give you a gift! It's a thing we do around here, don't question it. Anyway, I give you: an enchanted quill! This quill writes down what you say aloud, with flawless spelling and grammar. However, if you want to break a law of grammar for stylistic effect, the quill has some trouble writing that down. It can, it just won't be happy about it. Now, why don't you test out that quill on these files, hmm?