can include Kessig Wolf Run on my mono green commander deck and use it's 2nd ability even it requires red mana, although I can supply that red mana to activate it's 2nd ability?
No. You can't use any cards that have ANY mana symbols outside of your general's colour identity. This rule only applies to the actual card text, not reminder text, so for example you can use Blind Obedience in a monowhite deck.
Also, if you would produce mana outside of your colour identity, you produce that much colourless mana instead.
even for example Deathrite Shaman? I can't include that card also? or in other words even hybrid cards I can't include depending on my commander's color identity
Insectile Aberration is blue because it has a blue color indicator. This isn't the same as color identity, though color indicators are factored in for a card's color identity (hence why Garruk Relentless has a green and black color identity thanks to Garruk, the Veil-Cursed.)
thanks
Also, if you would produce mana outside of your colour identity, you produce that much colourless mana instead.
I'm sure that Insectile Abberation can't block Goblin Piledriver.
As a counterexample, the color identity of Bringer of the Black Dawn is all five colors because of its alternate cost, but it can block Goblin Piledriver just fine.