Should I use a digital camera, or iPhone 6 for taking pictures?

Obviously this question depends on the quality of the digital camera, I know. But I'm talking about one in particular. Let me start by saying I have VERY LITTLE real knowledge about cameras.

My friend just gave me a barely used Panasonic Lumix DMC-FX70. Its specs are here:

http://www.photographyblog.com/reviews/panasonic_lumix_dmc_fx70_review/specifications/

I think it's several years old and probably wasn't top of the line anyway… So I'm going to assume the quick answer is that my iPhone 6's camera is vastly superior in terms of quality… Right?

But I would like to know if there are ANY possible advantages to using this Panasonic camera instead of my iPhone… (e.g. Better for fast moving targets, like sports… Better in dark lighting… Better video options… Something like that). Any help is very appreciated!

Added (1). Thanks for the answers! I'm sure that digital cameras on the market now are probably superior to iPhone. However, the camera I'm talking about was made maybe 5 years ago and was probably an inexpensive one at the time. I'm not knowledgeable enough to compare the spec sheets of this particular camera and the iPhone 6 and understand the difference… But even THIS camera is capable of higher quality pics?

Can I use an iPhone without a data plan? - 2

I want to order a used iPhone 5c off of Amazon. However, I want to use it like an iPod. Is it possible to use it with no data plan, use my current Apple ID, and just use Wi-Fi?

Can I get these old photos back?

I had loads of photos and videos on my iPhone but I dropped it and the screen smashed. So I had to get the screen replaced. When I got it back it said it was locked for like 6 billion minutes so I had to get it reset. I didn't have it backed up on my computer but is there another way of getting the pictures back. I know there probably isn't a way so it's a stupid question but I really want those photos back. I had photos of old pets that have passed away and loads of other photos and videos.

Download a gif to upload to watt pad?

Okay so I enjoy writing books on an app called watt pad and I want to be able to upload gifs on there. I see lots of people do this all the time. I have no idea how to though! Can someone please explain how to download gifs, save them and then be able to still play it afterwards? (I'm using my iPhone 6 btw)

My iPhone camera won't work?

So a few weeks ago I accidentally dropped my iPhone 5s and I checked it, everything seemed fine but then I tried to use the flashlight and it just wouldn't work like I'd hit it and nothing happened at all. I checked the camera and the back camera wouldn't work either like it's just black, but the front camera does work. It's kind of a pain having to take all of my photos with a front camera or having to use someone else's and was wondering how I could fix it without having to pay to get it fixed?