First you must turn on console. How? You must go in option then keyboard and advance you can turn on. If you dont know how to use you just go in keyboard and go down down and down and you will see console.

Then go in console and you can type:

sv_cheats 0/1 If you are admin you can turn off or on console commands.

bind (key) (comand)- That command is to make some command to your keyboard for example bind K "kill" then when you tap K you will die :3.

noclip - Is command that allows you to fly and walk throug walls :D

sv_gavity (number) - You can set gravity low or high.

record - You can record... If you vont to stop just type: stop For more info go to link:
ent_create obj_sentrygun or dispensor or teleporter - It spowns sentrygun or dispensor or teleporter.

pwoers:

addcond 5 - Gives the player the ubercharged effect that can be removed if healed by Dispenser, Medic or being killed

addcond 11 - Gives the player a critical effect that can be removed if healed by Dispenser, Medic or being killed

addcond 19 - Gives the player the Mini-Crit effect

addcond 33 - Gives the player the Critical effect that will NOT be removed unless killed or removecond

addcond 66 - Bots will ignore the player even if the player bumps into a bot when disguised or cloaked

addcond 72 - Gives the player an effect that enhance their reload speed, firing speed, movement speed and grants infinite double
jumps

addcond 73 - Gives the player the Quick-Fix ubercharge effect

addcond 74 - Makes the player 10 times bigger and 10 times the health, also player will have infinite ammo but not clip size - player's melee range will remain the same

addcond 75 - Makes the player 10 times smaller - melee range and health will stay the same

If you vont to know command for bots:you can see down of this guide or on link:
Tnx for reading!!! :D

By: Me :3