Slenderman Monster

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However instead of taking
the easy way out how would i create a full skeleton for the model and create the appropriate animations for it. for example the flinch animation attack launch attack door break run walk notice and then idle of course. how would i create these and make them work correctly with the model as a normal monsters would

Oh that's easy, really. You just do exactly what Statyk wrote in his nice little tutorial, but instead of creating only one joint, repeat Step 2 about 20-40 times until you have all the joints you need.
Make sure they're in a proper hierarchy, the pelvis should be the parent of the spine, the spine the parent of the neck and so on.... (To parent an object under another one, select the "child" first, then SHIFT-select the parent and hit P. Alternatively you can drag the child with MMB onto the parent in the Outliner where all scene Objects are listed.)

You only need to create one arm and one leg, because you can mirror your limbs by clicking on Skeleton>Mirror joint with the shoulder joint or hip joint selected. Make sure you click on the small square to the right of the function, it will open a useful options window so you can check if you're mirroring in the right direction.

Then after you've smooth binded your mesh the way statyk explained, you select all joints and hit S on different frames in the timeline (for example frame 1, 5, 10, 15 and 20). Now you can go to each of the keyframes you just created and change the pose of the character so that an animation is formed.

That's the basics of it, pretty much. But you probably won't be able to reach much quality in your animations using such a basic setup, so I strongly suggest you go get yourself a ton of internet tutorials and start reading up on some of the following topics (In this order more or less, going from easy to more complex):
Skinning and Weight painting, Joint Orientation, FK and IK systems and when to use what, The Graph Editor, Constraints and Basic Control Rigs, proper use of Null Groups, Driven Keys, Custom Attributes and complex control setups with Hypershade Editor via Utility Nodes.

The last three are only necessary if you're really interested in all that rigging-animation-stuff and aim to do more complex stuff than a simple humanoid figure in the future, but I included them for the sake of completeness. Keep in mind, this is still only a small fraction of what there is to learn about animating in Maya, there's a lot of stuff I don't know anything about (especially all that film stuff, simulations and whatnot). But it should be enough to make solid rigs and animations for games.