Where to get Cheats of Team Fortress 2

Hi,
I had just purchased a pc version of Team Fortress 2 game. I am looking for a walkthrough and some cheats to play the game. Also need a general overview of the game. What is the game based on. That means what is the plot of the game. As seeing the disc cover it looks like a shooting game. Also please post some cheats to make the game play more easy. Thanks in advance.

Team Fortress 2 is a tactical shooter but especially violent. The goal of the game is shooting, buy and build useful structures. The characters of the game are the Engineer, Sniper, Pyro, Medic, Demoman, Spy, Scout, Soldier and Heavy. Every character has a minimum of 3 Primary secondary weapons (such as a Shotgun or Pistol) and a melee weapon such as knives, bats, etc. Team Fortress 2 is a great game.

I will list you a general overview of the game. So that you can get a better idea about it. The Engineer has, as its name implies the ability to build things. He uses Sentry guns, a teleporter and a dispenser. Then comes the Sniper. He has a real stealth sniper in 1 shot to the ability to shoot the enemy, the longer you zoomed in the more powerful the shot. I like Pyro with a flamethrower which literally means knocking the enemy and the damage is permanent as soon as someone touches your flamethrower.

Here are some useful tips you can use while playing the game. Choose Scout because he is very quick and agile. This can be used well to evade enemy missiles and bullets. The improved shotgun can be an opponent with one shot to do (but you must also close) to approach the enemy. A heavy enemy attack, the Scout should always be behind, as he will with his mini-gun on cause most damage. And try out these cheats MapFullbright - Show map plain to see better opponents, Whitewalls - white walls, NoSmoke - No smoke,
Nosky - No Heaven, etc.