You have a couple of options. You can check with your insurance company's claim department. They should have a model to help you. If they are unable to help you, you should seek some legal advice. They can make sure the at-fault driver's insurance company adequately compensates you for the loss of your property (totaled car). This model should reflect the other insurance company's compensation for their rental (and possibly towing) responsibilities.

Remember, when you acquire another vehicle, you can click here for an auto insurance online quote and be able to purchase your policy immediately.