The toolbar should show automatically if you have created a menu and set it to be the primary menu.
If you mean the wordpress toolbar that shows at the very top when logged into the dashboard area then check the option on your profile i.e. user \ your profile - toolbar option - make sure that is enabled…
Maybe a link to the page would help clarify this and we can see if we can fix this up for you.
Could you provide a link to the site we check this.