This is expected - ls is the Unix program. On Windows (in Windows command prompt, to be precise) the analog will be dir - use dir /? to learn how it works.
cargo run should be executed from the project root, i.e. the current folder of the command prompt must be the project root. To change the current folder, use cd /path/to/dir (execute D: first, for example, if your project is on drive D).
Try using backslashes, not forward slashes, i.e. ..\target\debug\hello. Yes, that's one of the Windows-specific parts.
Please copy the exact lines from console (your input and the output) and format them according to the pinned post, it's hard to understand what's going on. Did you try to use dir /? first to see the built-in help?