Got a iPhone/ a pc without iTunes/WiFi - Needs to transfer files from iPhone to pc. How?
Here is how to transfer your photos to the pc. The charging cable serves both as a charging cable and a data transfer cable.  Disconnect the cable from the power adapter.  Plug the usb end into your computer.  Plug the other end into your phone. You should see the phone as a new device. It will appear as a photo card. You need to drill down until you see your photos. 

Security restrictions have gotten tighter on the iPhone over time.  You can try 
https://macroplant.com/iexplorer for the other file types.