The personal expenses are non-deductible as business expense. For your gas expense, you can either choose to claim standard mileage ( mileage usage only) or actual expenses (gas, insurance, repairs, depreciation of the car, and other related business vehicle expenses). You must determine the business percentage usage of the vehicle and deduct based on the business percentage. For example, if your total mileage driven for the whole year was 20,000 and the business miles was 10,000, business percentage was 50%.
If you are a sole proprietor or a single-member LLC, you report your income on Schedule C, You can't pay wages to yourself not unless you're an S-Corp and an employee to your S-Corp.
If you have rental loss, you can deduct your loss up to the amount of your earned income.
