If I am working full time, will I get less financial aid for University?

You likely will be limited to loans only, but that is still financial aid. Expenses are NOT taken into account on your financial aid application. There is nowhere on the application to even mention expenses. You can find out what you may be eligible for by filling out the FAFSA at fafsa.ed.gov

It's really hard to answer this question. The people in the financial aid office can tell you. They usually take into account your income and your expenses. If you're supporting a child, that will be factored in. Most schools will try to put together a financial aid package for you. Many of my students are working full time, and they still get financial aid. A lot depends on what state you're in. My state has a scholarship funded by a lottery. It used to only be available to people just graduating from high school, but that changed last year, and people over 24 can now apply for it, too.

Federal student aid is based on the information you provide on the FAFSA, and one of the major factors in determining eligibility for grant aid is income. In most cases, an independent student who works full time won't be eligible for the Pell grant, but will be eligible for federal student loans. With loans, the amount is based on grade level, so your income will not affect the amount that you are offered. However, a student who works will generally do better than one who doesn't, because the most you can receive in a Pell grant is $5815 for the year. If you work full time, even at minimum wage, you'll earn much more than that, so it makes more sense to work if you can. Depending on the school you attend, your financial aid package may include aid from sources other than federal aid (such as state grants or scholarships from the school's own resources). So, it's possible that you would receive more by not working, but that would not be the norm.