Shooting Game HELP PLEASE

Hello People. I am Vlad.Recently i created my own weapons and models and animated them also i programmed a few of them.but my question is i want to make a script.how to make a script so when i press "E" Button on pointing on my cube it will actualy pick it up! like in counter strike 1.6 so when i press "e" and watching on my cube i will rotate the mouse as i want and the cube will rotate and move either !! help please because i don't understand in camera programming ! hope you will help me soon ! vlad------