Planned parenthood. Please help!!

So I plan to set up a meeting with planned parenthood to see if I can get birth control. I'm only 17 and I don't want my parents to know so I don't plan to use their Insurance. So my question is, when I set a meeting and go, will it cost me money to meet? Will I need proof of income or lack thereof (I don't have any income). Do i need to bring anything with me to the meeting? Like ID or anything? I live in Washington state. Thank you for your help in advanced!!!