first of all: your keyboard is not at all being disabled when you type in youre root password. only for security reasons it is not showing anything like stars or stuff, to avoid that other ppl could see, how much letters your passphrase has.
second simply get the driver for IA32 from the nvidia homepage and install it on the console via: $sh <nvidia-driver-file>.run. you should be root to do it.
third one: normally you dont type just root to become root, but enter su to become SuperUser.
hope youll manage this....