No fees to drive the loop. Only if you stop somewhere
The drive is part of the Mt. Timp Cave National Monument. There is a day use fee to go into the canyon from both sides of the drive.
Driving the Alpine Loop is free. Parking anywhere costs money. As mentioned you can by a day pass or an annual pass. The day pass used to be good for 3 days, but I don't know how long it's good anymore. If there is a ranger at the booth, just tell them which you're planning and they'll take care of you.
No fee. I've seen a guard shack, but never anyone there. If you stop your car at the Springs it will cost to park. Other than that no fees to go on Alpine loop.
Yes to all
You can either pay a day fee or use/buy a national parks pass.
Yes. There is toll booth
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