Yes, there is. You must make a autoexec.cfg file in the C:\Program Files\Steam\steamapps\(Your Steam Username)\garrysmod\garrysmod\cfg folder. The file must contain r_drawparticles 0 on any line. This file can also contain any console command that you want ran when you start up Garry's Mod. Also, this does not work online (although I believe you can do it manually if the server supports console commands).
no because garrys mod requires that you have a game that uses the source engine
That depends on what your parents/guardians let you play Garry's Mod contains blood, zombies (depending on gamemode), and language from the chatbox and voice chat.
gmod is 10$ at garrysmod.com
You have to build one.
No. it is PC only.
You can't
Buy Garry's mod 10 off of steam.
Garry's Mod 10
technically yes, there were a few updates it is still called Garrys mod 10 though
no because garrys mod requires that you have a game that uses the source engine
Garry's mod tornado
Garry's Mod has now updated and includes all features of 13 Beta
Steam
yes
You Do Not Get Garrys Mod Serials, You Buy it Off Of Steam Which can be found at steampowered.com its usually about 21 United States Dollars
There is, 10$ Steam
no