You have a couple options for doing this in SSRS 2008, both involving Placeholders.
Type in "Name: " and set the TextBox FontWeight property to Bold.
To the right of "Name: ", right-click and select Create Placeholder ...
Set the Placeholder Properties > General > Value to your StaffName field.
Change the Placeholder Properties > Font to un-Bolded.
Place the TextBox into edit-mode (blinking cursor).
Right-click and select Create Placeholder ...
For General > Value, type
="<B>Name: </B>" & Fields!StaffName.Value
For General > Markup type, select HTML - Interpret HTML tags as styles
Edit: The parser was messing up the less-than and greater-than symbols.