Try getting a good MTB matenence book. I have Mountain Bike Maintenence by Guy andrews and its pretty helpfull. If you get a different one, make sure that it is up to date and has instructions for the latest bicycle componenets. If you're lucky, a local book store might carry one.
Why yes you do need special tools. Your local bike shop would have all the tools you need. If you plan to do all of the mantenence on your bike, you might want to invest in one of the complete tool kits from Park tool. It would have all the tools you would possibly need, but they are not cheap and you may never use all the tools.
Basic matenence requires these tools:
Tire Irons+patch kit
hex wrench multitool or set
cone wrenchs
Or you could take it to your bike shop every once in a while for a tune-up, but its kinda nice to be able to keep your bike running by yourself.
You'll get it.