arcgis desktop - Error 000735: Input Dataset or Feature Class: Value is required

I am a true novice when it comes to ArcGIS and computer programs like this one. Am taking a class and cannot get the Project function to work under the tool box.

The path I used was ArcTool box --> Data Management Tools --> Projections and Transformations--> Feature Path --> Project --> (This gives me a blank box and when I double click on the OK button I get the following message:

Error 000735:  Input Dataset or Feature Class:  Value is required
Error 000735:  Output Dataset or Feature Class:  Value is required
Error 000735:  Output Coordinate System: Value is required

Can anyone tell me what I can do to remedy this?