3. WHAT`S YOUR NAME ? = Wie ist ihr Name ?
Thats word by word Translation, the one "Knut" gave is better
"Wie heißen Sie?" translated by meaning , sound much better
5. Wo arbeiten Sie? = Where do you work ?
Yes,... you´re right its used in German in dally speak as "What do you do"
But I don´t like to mix up the Questionword at this basic level
Wo? = Where? What? = Was?
Was machen Sie beruflich? = What do you do for a living ?