No
You can get Garry's Mod 9 for free, yes. But Garry's Mod 10, (11), you have to pay for. But Garry's Mod 10 is really worth it, in my opinion.
Mods are free, but the XBox360 version can't be modded.
Mod means modify - which can be done in hundreds of different ways.
No Mod the Sims is a free site.
You will need to mod your xbox 360 which is illegal.
Usually, a mod is free. I have not seen any mod wich costed money.
You cant mod a car in GTA 4 but you can in vice city stories.
You can add a Mod called CAR INTERIOR MOD . See the related link for further information.
When you are installing mods for cars you are asked which car you want to replace.So that means if you replace a car then you will hopefully find the mod where ever that car is there in the game.If you apply some building mod or the mod which activate somehow then you need to either go to that building or do what activates the mod.
Usually, a mod is free. I have not seen any mod wich costed money.
i want to play garrys mod no downloading and no buying
There isn't any cheat for the Mclaren F1 because there is no such car by default in the game.You need to install the mod for the car to appear in the game.You can download the mod for the car from internet and apply it using a mod installer.