How do i take off a pass word if i know nothing about the system console

The unlock sequence changes with ever mainboard type and dash version. The easiest is to call M$ support. They'll give you the code based on your serial number and dash version.

these are known working codes:
1. On the 360 dashboard, scroll over to the "System" tab.
2. On the System tab, click "Console Settings".
3. Scroll down in console settings and click "System Info".
4. When the system info box comes up scroll down to the bottom of the page then type in this sequence:

LEFT TRIGGER, RIGHT TRIGGER, X, Y, LEFT BUMPER, RIGHT BUMPER (Do this twice)

LEFT TRIGGER, RIGHT TRIGGER, X, Y, LEFT BUMPER, RIGHT BUMPER, X, X, UP, DOWN, DOWN. Then down, down again.

Left Trigger, Right trigger, X, Y, Left Bumper, Right Bumper, DOWN (dpad), Y, Left, Left

LEFT TRIGGER, RIGHT TRIGGER, X, Y, LEFT BUMPER, RIGHT BUMPER, X, X, UP, DOWN, DOWN

Best bet it to do a full reset on the system: How to reset your Xbox 360 console

Try deleting the old user account from the systems main menu, or just creating a brand new one