if you forgot the password on ur iPad, sync it to ur itunes account on ur computer. Since you must have had it connected to it once since owning it, you will be able to backup, wipe, then restore it. But ONLY if you've had it connected to that iTunes before, but since you've had it for that long, you must have.
If it's a network password, press the reset button on the back of the router for 30 seconds and then you just input the default password if any is required at all.
Since you must own this iPad, it won't be difficult to perform either task.