It doesn't look like your environment is setup correctly. My first step on setting up this environment would be
setting up the Raspberry Pi. (https://developer.microsoft.com/en-us/windows/iot/GetStarted). This would allow for you boot the device and remotely connect to a web interface to manage the device. Once this is done, then you should make sure your visual studio is setup correctly. After this is complete, then it is all about deploying your app from visual studio to the remote device. Once deployed, you can set it as a default app which will start when the Pi starts.
I can say that this process does work. I followed it an when developing my first app to be a remote monitor for a security camera system. Once I created one, I was able to copy the SD card and now I have multiple security monitors.
Good Luck on your endeavors.
P.S. I am assuming that you have performed simple google searching of
Error DEP6701 : Bootstrapping failed with unexpected error: 'DEP6960 :.