Counterstrike help

i played counterstrike before but this time i decided to install it on my laptop, know my problem is how can i access the thing where you can type the commands like sensitivity=9, it’s supposed to be this key "~’ on your keyboard right? but how come i can’t pop that thing out? do i have to download any patch? do you guys know any place to fix this i dont to download the patch from valve because it’s 125mb and i am only using 56k