Your question is better suited to the InDesing forum, which deals with general InDesign-related issues. This forum is intended mainly to deal with issues arising from the Getting Started video tutorial on creating a brochure in InDesign CC.
I hope you find the help you need there.
Delete what? Text? Objects? Select text and hit Backspace or delete key on your keyboard or Choose Edit/Cut from the menubar. Delete objects: click on them with the Selection tool (the black arrow) and hit Bacspace or delete key etc. But this is so obvious that you must mean something else...?