Can anyone help me merge these two sentences together and to take out any uneccesary parts?
In john Pilgers "hold the Front Page" he recounts back to when he began his career as a journalist. His purpose is to relate his experiences from the past to how the media in this current socitety has changed
There are many ways to merge these two sentences. In light of this I will give you a few variations. Also good writing is usually succinct. So, I applaud your desire to take out unneeded words.
This is very close to the original:
In John Pilger's "Hold the Front Page" he recounts his career as a journalist; his purpose is to relate his experiences to show how the media in this current society has changed.
Here is another version:
John Pilger's work, "Hold the Front Page" not only seeks to recount his career as a journalist, but also to show how the media has changed.