In order to use the Giveaway box you will need to sign into Rafflecopter either with Facebook or any other way they allow. They won’t contact your friends without your approval so you can push allow it to connect with your friends and it won’t do anything without you knowing.(unless they make changes).
For the pinning articles option go to an article (there are many on my site) and click on the Pin button at the top of it. Pin it to your pinterest board and then quickly click see pin when it pops up. If you miss that you will need to go into Pinterest and click on your pins and then find the pin you pinned. Then click on it once and copy and paste the URL into the giveaway area.
For the rest of the steps it is very similar. Raffle copter also has little tiny links that explain how to find things if you can’t figure it out. You can also leave a comment and ask how to complete a specific step and I’ll get back to you.