You do not make an account on Garry's Mod. You need something called Steam.
http://tinyurl.com/2vwrgf5
Buy Garry's mod 10 off of steam.
yes
go to steampowered.com make an account download steam on your computer and then go to the the search bar and type garrys mod and download it it cost $10 you have to have a game source though like half life the cheapest source is half life death match
technically yes, there were a few updates it is still called Garrys mod 10 though
Garry's Mod 10
own a server or ask the owner to make you admin
no because garrys mod requires that you have a game that uses the source engine
Garry's Mod has now updated and includes all features of 13 Beta
The game is not sold in stores. It is sold on a game selling company called steam. You would need to make a account on steam and buy it there.
Garry's mod tornado
Check your "Options" to make sure the spray you want is still set.
Steam