I am assuming you are above 19 and a full time college student and dependent on your parents for half your support. If your income is less than $5950 as pointed out by Swimcatsmom, you do not have to pay taxes and can get a refund if you file a return. However, if you have unearned income (e.g. interest, dividends etc more than $600 you may have to file taxes.
You may want to look at the publication from IRS Publication 929 (2011), Tax Rules for Children and Dependents
Again, as I understand, If you had legitimate moving expenses, they may be tax deductible (again it depends upon amount, distance moved etc,). Living expenses are generally not tax deductible.
As pointed out by swimcatsmom, please talk a tax expert with actual details and they can tell you what is deductible or not. I am not tax expert or lawyer etc.