My car was hit while I was in bed sleep. Im need help getting a new car.

If you had the relevant insurance (e.g. collision) on your car, submit a claim to your own insurer: that is the fastest, easiest way to get compensation. Let your insurer pay you, the sue the other side to recover their money (i.e. to be reimbursed for what they paid out).
If you did not have insurance, the at-fault driver is liable (financially responsible for) the  then-current fair market or "blue book" value of your car (what it was worth, given make, model, year, condition, mileage) when destroyed, as well as for rental costs for a "reasonable" period--how long it would take the typical or average person (not you specifically) to get a new car: call it usually a week to 10 days.
The problems you face are:
1) As stated, the amount you are entitled to is what your car was worth, not the cost of replacing it. If your car was older or high mileage, you may get much less than you need for a new car.
2) The other driver's insurer is *their* insurer, not yours: they do not have any duty or obligation directly to you, but rather have the obligation to pay for their insured if he or she is forced to pay you. Often, when fault is clear (like in this case; a parked car was hit), the other driver's insurer will choose to pay you voluntarily, to resolve a case quickly and efficiently if they think that their driver would lose anyway if sued. But while it often makes sense to offer money voluntarily to "settle" the case, they don't have to--they can force you to sue for the money. Or they may be willing to settle, but are delaying, inefficient, dragging their feet, etc. And if they do voluntarily offer you payment, they could offer you less than your car was worth--you'd have to decide whether to take it or hold out and sue for more. All of this means that they may not offer you money quickly or even at all; and if they do offer you money, may offer you less than are entitled to, in hope you'll settle the case for less.
When these things happen, your recourse is to sue the other driver for the money (blue book value; some car rental costs) you are entitled to, but lawsuits take time--typically months, if not longer. You can't force them to help you get a new car--all you can do is sue for compensation. So if the other driver and their insurer are not voluntarily offering you money right now, you will have to find some way to pay for a car on your own, while suing them later for compensation.