I apologize for the lack of polish in the questions, I was on the phone when I asked them.
I meant it enabling tap to click on the Login screen, as clicking on my touchpad on my laptop has stopped working.
Searching for it on the forum has lead me to this response which I believe will solve the problem. I can't log out right now but will double check later.
Sorry again, I thought it was implied I meant on the Login screen. A good opportunity for me to learn to be more clear on my questions.
Searching for this in the forum hasn't returned many useful threads. One pertaining to XFCE and another that seems unanswered
Lastly, for the wallpaper, I did manage to find a couple relevant threads that indeed may be exactly what I am looking for. I will try them later as they are more complex than the replacing of an img file that I imagined it would be.