Having a hard time removing the master cylinder?

You must remove the transmission of the car to replace the clutch slave cylinder, here is a video of the job being done on a similar car so you can see what I am talking about please I have including diagrams in the images below to show you how the job is done on your car.

https://youtu.be/6N6b5F2ChyE?si=XfnVpmEL4nFAQyVr

Check out the images (below). Let us know if you need anything else.

I have replaced the slave cylinder, but I have no pressure at all is a Saturn ion 2004, Pedal goes to the bottom and stays there.

That's the slave cylinder.

That's the clutch master cylinder. It should self-bleed, I would make sure it is full of fluid and then pump it about 50 times you should get a good clutch pedal. Let me know.

I just replaced the slave cylinder but still no pressure at all, it could be bubbles? How do I purge it? Or could it be another problem?

It should self-bleed, I would make sure it is full of fluid and then pump it about 50 times you should get a good clutch pedal. Let me know.