It is no feat to be accepted at Mt. St. Mary's! Congratulation to her, and to you for guiding her well!
Like the others said, you need to apply for Federal financial aid ASAP! The amount of money available for grants has increased, and it is NEEDS based. Also, has she applied for scholarships? Check out your church, any public organizations like Rotary, Mt. St. Mary's, or even your former employer if they have a scholarship fund. Many high schools also have a scholarship program where they list a ton of scholarships available and how to apply. Also check the internet for scholarships. Look for any that she might be specifically available for, like lower income, ethnicity, her intended major at school, etc. Applying for scholarships can become something of a pain in the butt, however it is totally worth it. If she receives a bunch of 500 and 1000 buck scholarships, well, those can add up!
As for transportation, check out RTD. I used to live in North Hollywood and Northridge, and I know the LA bus system saved me many times when my old beater car would die.
Again, congratulations to your daughter. I really hope you all can find enough grant and scholarship money for her. I would also add that I took out student loans to finish my college, and never once regretted making that payment each month. Without those loans I would still be waiting tables, and each day I am glad that is not my situation.