Few questions

[FlawlessHappiness]

Yea, with the basic settings you can fade the sepia colors. Makes everything redish.
You can fade the screen in and out.
You can turn the head of the character to any degree you want.
You can force the player to stand, crouch, look at something, walk, or make the actual player unable to control.
You can make the blurry effect that happens when you look at a monster.
You can make a fading blurry effect that looks a little like Motionblur, but it's not the same. This one is much slower.
You can teleport the player. This is good when you make a transition/intro/outro. First fade out the screen, then teleport the player, then fade in.

Most information about how to use them are actually already given in the EngineScripts.

How do you make player to walk forward actually? I found script "MovePlayerForward" on wiki, in EngineScripts, however, didn't quite get it.

As the chaser wrote, it's just a simple timer. A timer that keeps calling itself very fast.