You'll need Schedule C for your contractor income, and Schedule SE for your self-employment tax. Don't forget the last line of Schedule SE, where you deduct half of the self-employment tax from your income.
Your business expenses can be deducted on Schedule C. You must have records and receipts detailing what was purchased, and what the business purpose was. For car mileage, you must keep a log of where, when, and for what purpose you were using your vehicle.
You'll use Schedule B for Dividend and Interest Income.
