I have a TracFone. If I get an iPhone can I keep my TracFone number?

I have a TracFone. If I get an iPhone can I keep my TracFone number?

Yes

Yes. If you're putting an iPhone on your tracfone account you just have to swap the IMEI (the phone's identifier, like a serial number) attached to your phone number. If you're moving to a new carrier you need to have the account number and pin (which iirc for tracfone are the IMEI of your current device and 0000), with that you can port the number to the new carrier. Obviously the line needs to be active and in good standing.