TemplateToaster provides an option to add Title to each page , to set the title please follow the steps provided below:
Go To TemplateToaster -> General -> Add/edit page -> select the page -> edit/modify -> set title.
To set description and keywords globally please go to Joomla Dashboard -> System -> Global configuration -> Site -> Metadata Settings -> set site meta description and site meta keywords -> save.
Also, To set description and keywords for each page please go to Joomla Dashboard -> Articles -> edit any article -> Publishing tab -> Set Metadata description and meta keywords -> save.