Mixture, thanks. I've tried connecting using my admin name on the Tosh. That didn't work. The workgroup name is actually 'workgroup'. I might go through the procedure again just to get familiar with these.
Perhaps I should be using my Mac account password. However, I've messed up somewhere with that. I thought it was my name, which is 6 characters long (well, it was the last time I checked!). However, the field indicates it's 7 characters. I need to resolve this but I can't change the password.
I'll be out for a few hours but will double check what I've done so far later. However, I have connected at least!