Welcome to the forum.
Unfortunately, you have posted to the Tips & Tricks sub-forum, which is a repository for articles on how to do various things in PrE. Steve Grisetti, our tireless MOD will move this out to the main forum, so more folk can see it, and comment on it.
Now, I have not used PrE 3, so a bit of this might be specific to PrE 4, but I doubt it.
In PrE, you can click on Title and get to the library of Titles. You can look through those, to see if any get you started. If not, you can then create the Title, that you need from scratch. Choose Title>New Title>Default Still (from the Toolbar). This will add your New Title to the Project Panel, and then open it in the Titler. It will come in with "Add Text." Just use the Selection Tool (arrow), and delete this. Use one of the three Shapes Tools to create your box, and the Color Palette to chose the colors. Then, use the Text Tool (T) to do your Text. Drag it over your colored box.
To add things like Stroke, etc., Select, and then choose a Style, that has these attributes.
Hope that this helps. If there are any big changes between PrE 3 and PrE 4, I am sure that someone will point these out to correct my comments.