Always use the grade of oil specified in the vehicle owner's manual or maintenance book for the climate in your area. The wrong oil or oil filter may void your warranty. Typical modern oil ratings are 5W-30 and 10W-30.
The actual cost of this service will vary due to factors such as the condition of your vehicle, your climate, your geography, and your driving style. Your Service Provider has the knowledge and expertise to make the final price determination.