Although I'm not Tux but I can answer the questions for you.
For images, ycan go to the classic editor by clicking the arrow beside the editor button. Then you can add one photo (or one gallery containing multiple photos) by clicking to respective buttons on the right side of your screen.
For links, use this [[ ]]. For example when I wanna link one of my favorite characters, Joe Warren, I will type like this [[Joe Warren]], and it be linked like this, Joe Warren :)
On the page for Rick Lewis, when I was looking through the history, I saw someone change the "Killers" category to "Fake Killers," and that fake category was later removed. Would it still be fit to re-add the "Killers" category for Rick?
Hello, Tux. Our Turkish Wikide activity isn't much. There are 4-5 people. We need more people. That's what Edward Dante said. I know. You are interested only in the English Wiki. But if possible, a few people in this wiki Turkish wiki can come?