Title field only available
From reading your question it seems like the fields haven't been added to your entry type for the section you are trying to add entries to.

The first thing I'd recommend doing is to go to Settings > Sections then find the section in the list you are trying to add entries to. 
You should see an Entry Types column at the right; click on the Edit entry type option for the section.

This part of Craft allows you to add the fields you would like available in your entry. You can create your own tabs to categorise your fields as you see fit.

All you will need to do is drag the fields from the bottom of the screen into your field layout.

Go back to the entry and hopefully the fields you added will be showing!