I need to get all my teeth pulled and dentures. my ins covers 50-80%. how much will i pay out of pocket. and can they pull all of them at one time?

Depends: You will pay 20-50% of the total quoted to you by the private dentist. What that fee totals will vary widely between oral surgeon/prosthodontist specialists at one end of the spectrum and community health clinic at the other. Where you fall in that spectrum will depend on your location, likely complexity of the extractions and dentures, your income and underlying health issues. Yes to all-at-once.

Pre-determination: Insurance plans have fee schedules, deductibles, maximums, co-pays, percentages, restrictions and other limitations. The best way to get an accurate answer to your question is to have a dentist submit a pre-determination to your insurance company which will respond with exact figures. Then your dentist can discuss procedures, timing, and payment. Yes but not always the best way. Discuss options.

WAIT!!!!!: It says you are a 28 year old male. If that is true, do not remove all of your teeth until you get a second opinion. If necessary, consider dental implants ! gum tissue supported dentures are a bad restoration for you to have for the many years rest of your life, you will develop significant gum recession, have pain & difficulty eating with poor digestion. You will look like the picture.

Not sure: Depends on the dentist's fee and the calendar limit of your policy.

Dental Insurance: Is sadly a joke. It is more of an assistance program, a contribution of $1000 or $1500 or whatever your yearly max is. The term "insurance" is misleading and should be revised. It would be best to understand the full cost by your dentist for the total work and then budget accordingly prior to getting started. Whatever the "insurance" contributes would be less that you owed. Hope this helps.