Hi Captain. Well, i hope this may be usefull for you.
First of all, i think you must break down your character in separate pieces. The animated and the non animated ones. Of course, you dont have to draw
all parts of the character in all the frames. Your dino have a gun in his hands, this helps to make easy for animate, so arms and gun dont move, only follow the body's
movement. So i think you only need to animate the legs. Well, the way is this:
First of all , understand the poses you need. For a simple walk cycle you need 4 poses.

Notice that frame for even a easy way, the poses are really 2...1 and 3 are similar, the only difference is the foot that is steping on. 2 and 4 the same, i copied the frame 2 and only redraw and erase to it looks the red leg is in front of us.
This sample is running at 5 fps. You will wish your animation be more soft and more elaborate. With this key poses you can inbetween 1 frame and duplicate the level of detail for this movement. Like this:

Same work, so walking is a symetrical movement, the poses we draw can be reused with little variations for both legs. This is running at 10 fps, this provides a acceptable animation sensation.
Last step is join our body or other parts.

With this base walk cycle, you can now experiment and add some animations how the tail, the bullets or the spin of the head.
I was help you? I hope so.