The college will expect you to pay your tuition before classes start, but most students don't pay that out of pocket because they use financial aid to pay it. Financial aid can come from several sources:
1) Grants. These are usually based on financial need, so not all students will qualify. Grants do ot need to be repaid.
2) Scholarships. These can come from private organizations or from the school itself. They can be awarded on the basis of financial need or merit (such as high grades)
3) State Aid programs--most states offer financial aid programs that can include grants, tuition waivers and low interest loans.
4) Student loans--these can include federal student loans they aren't based on credit, or private student loans that do require a credit check. In most cases, payments can be postponed until after you graduate, and you typically would have at least 10 years to repay.
With all those sources of aid, it is not uncommon for a community college student to find that he does not have to pay anything until he graduates. For an estimate of what you can expect at your particular school, you should contact the financial aid department there.