Now for the fun stuff...

The basic single stage turbojet design is what sparked the whole jet age. Turbojet engines are mainly found in aircraft
They work just like a power turbine with two main features added in front.  A compressor section and a combustion chamber.
++

=
top left is from p. 3-15, top middle is from p. 3-22 and bottom diagram is from p. 3-17 *

The turbine spinning is used to spin the compressor section which feeds the combustion chamber. Air and fuel that is mixed and ignighted in the combustion chamber powers the turbine. It is called a gas generating turbine since the source of the gas used to drive turbine is a part of the turbine. The large amount of hot gasses expelled out the back provide trust.

page 3-38*

The diagram below shows the names and positions of the various sections in a turbojet.

page 3-8*

The amount of air that is pulled into the compressor has a minimal contribution to the overall thrust produced by a turbojet engine.
 

*Whenever there is a page number underneath a diagram the picture is from
A&P Technician Powerplant Textbook published by Jeppesen Sanderson Inc., 1997