Can I make a lead sheet using garage band and if so how?
In GarageBand on Mac? Not really;
You can print the score for one track, if this track is a software instrument track.
Select the track, open the track editor window, set it to "score" view.
Then select "Print" from the File-menu, and you can print the score for this one track - that is all that is currently possible in GarageBAnd to print music sheets.