My saturn ion 2, when in first gear with clutch pedal all the way down. The car sometimes goes by it self like it's an automatic. In addition, I can't shift into anther gear or neutral.-at that point I turn the car off and then start it to correct the problem. Please help.

Make sure the clutch pedal mounting bolts and bushings are tight. Check the fluid level for the clutch
master.(same as brake master resevoir)If it is low check for leaks. No visable leaks,bleed the clutch
master. The master is located under the hood, to left
of brake master. Clean any grease dirt etc. from bleeder screw. With small dixie cup 1/2 full of brake
fluid,a piece of rubber hose about 6" long. Place one
end snugly over the bleeder screw,the other end into
the brake fluid.(submerged) Have someone push down on the clutch a couple of times,until there are no air bubbles in the cup. Have your helper hold the
clutch down,while you tighten the bleeder screw.
Hopa this helps.
Good luck