As for financial aid, yes, both parents income counts. You fill out a FAFSA student aid application. When you finish the application you will get an e-mail telling you what your (as in both parents together) expected financial contribution is. That number will be mind boggling, because the Feds generally expect you to spend about 28% of your GROSS income per year on college costs. And if you contribute to a 401k at work, or an IRA or other retirement plan with YOUR money, be warned, unlike the IRS, they do not deduct that from your gross income. The Feds consider retirement saving to be a secondary priority to paying your kids college tuition. There are exceptions for older parents......but I think it's pretty old, like over age 60, and most parents with kids in college are much younger than that.
And be warned, the Feds are rating you for financial aid.......they lump scholarships and parent and student loans under that heading. So being told you qualify for a lot of financial aid, may mean 80% of that is loans, and 20% grants and scholarships.
You will also apply for a PIN number. All the instructions are on their website.
Their site is
http://www.fafsa.ed.gov/