These are free. You may see a few with watermarks, they are not free. Everything else is. pixabay.com good luck, Robert

Pixabay.com is great

Generally, with "free" pictures, I have found, you can pick up viruses. I personally surf the sites and look for paid pictures that can be downloaded from secure sites after they verify that we are both legit.
Good luck on the pictures! Cheers, Bunny

there are not a lot of good ones out there. A google search will provide you with pictures. Just alter the image search to retrieve images allowed for reuse. Another one is creative commons. You can use these too.

I actually find using photos I snap on my smart phone to be better because they are unique and I own and can alter them. All i need to do is put my water mark on them and its mine forever

It's not a post, it's a page....

Make sure in "edit post" you have "Allow comments" ticked. It should be somewhere on the right, or down below your post.