ETA: If you were NOT at fault - then the other car owner should have insurance and they should take care of you. If you both don't have insurance? Don't know what to tell you....not trying to be mean. Really. but really irresponsible.
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M.:
I'm truly sorry you were in an accident and totaled your car.
Make a list of everything you need to do. And check it off as you go. Write down who you speak with - include date and time and keep your notes in a location that you won't forget - like in a journal or spiral notebook.
The first thing I would do is contact my employer and tell them what happened. Provide a police report for verification. You never know - there might be someone who lives near you who can take you to and from work.
The next thing I would do is contact my insurance company. Have them tell me how much my car was worth and when I will be getting a check for it's being totaled. Ask if you have rental car ability while you are searching for a new car.
Then contact your bank or any lending company to see what you qualify for in way of cars - how much can you spend and how much your payments would be.
Then contact your church. Find out if someone has an extra car they are willing to let you use, borrow or buy. You will NEVER know unless you ask.
If you have family nearby ask them for help as well.
Again - I'm truly sorry. I am glad to hear that no one is seriously injured. Good luck!