I am sure you will get a lot of different opinions on what to use and what not to use with regards to oil in your pistol. Keep in mind that too much oil is worse than too little. Oil will serve two purposes: first as a lubricant for friction areas and second as a preservative/rust preventive. If you can see the oil you have too much on. Everything I oil gets wiped down very well before going back in the gun.
With regards to what to oil look for any place where you have metal contacting metal like the pin on you barrel lug. The biggest contact points will be between the slide/slide rails. Some will say oil is fine and some use grease. As far as what is the best product to use you will get as many opinions as posts. I use either synthetic motor oil, CLP (probably similar to what you got at the range), or Militec-1 (the most expensive of the three) depending on my mood. I wouldn't worry too much about your decision because almost anything you choose will work well. Most importantly, enjoy your new gun!