What year and engine size is your vehicle? I'm assuming it's and automatic? Let me know and I will try to help you to the best of my ability. Thanks!
So when you try to engage the clutch, the shifter will not go into any gear?
Without being there with the car, but from the description you are giving me, the problem is in your clutch assembly. It could be either the pressure plate or the release bearing that is the problem, not allowing the car to respond to you putting it into gear. I hope this helps, please get back to me if you have any further questions and I will be here to assist you. Thanks! XXXXX