To use console in a game edit your link to run RAGE game or just create the "run.cmd" file with:
@rage.exe +set com_allowConsole 1

BUT after you allow console in the game, you cannot get RATES, because game detecting cheating option.
To use console commands without warnings you can simply create an "my.cfg" in "/rage/base/" location and bind some key for example to use execution of your file:
in /base/default.cfg:
bind "p" "exec my.cfg"

After this you can change some values in the my.cfg and run the game. Then uses P key for execution of the my.cfg with any parameters, for example:
g_fov 120
com_maxfps 120
cvarAdd g_vendorSalePriceScale 1
cvarAdd g_infiniteAmmo 1
cvarAdd vehicle_infiniteboost 1
cvarAdd vehicle_god 1
pm_crouchspeed 300
pm_walkspeed 350
pm_runspeed 380
pm_sprintspeed 500
pm_sprintbackspeedratio 0.50
view_damageblur 0
g_weaponkick 0
g_knockback 0
s_volume .7
pm_runspeed 500
m_smooth 0
image_anisotropy 16
vt_maxPPF 16
g_playerHealthRegenDelay 0
g_permaGodMode 1
timescale 1.2

etc

And now you can use all console commands trought editing the my.cfg and execution trought "P" key without console.

Thanks for the info. I thought that cvarAdd commands were disabled in the patch released on Oct. 8th. Do any of the commands actually work or do you use the older Rage.exe?