Not sure about the tinkerbell one but the frontierland pin is from a old set involving the many lands of the parks which were including Frontierland:Adventureland,
fantasyland,Tomrrowland,NOS,Bear Country,and Main street USA
That second one is very old, before pin trading began. You might try to find it on ebay, search "Disney pin, frontieland pete" and maybe Taiwan. Taiwan is the clue that it is old since it's not China where contempory pins are from.
The first one is a limited edition and is older, but not super old like the other. Try to find it on ebay too for pricing.
Don't expect hundreds, but maybe dinner at a chain steakhouse.
Be Cool Stay in School!
Next year I'm trying for a summer internship at Stark Industries.
Check pinpics.com too. For the Frontierland pin search under the keywords Disneyland 30th. That pin was part of the 30th Anniversary celebration and was a giveaway pin at the gate. It's a fairly common pin though yours looks to be a variant. I believe the original had pointed edges.
For the Tinkerbell pin try Disneyland 50th or Magical Milestones and limit the search to Disneyland only. The Magical Milestones pin series was quite extensive and some of the pins are rare but not all of them.
PinPics uses a have/want ratio. In theory (at least what I've deduced) the less people trading a pin versus a high rate of those wanting it means it might be a more valuable pin.
I'm not a pin person but another indication that the Frontierland pin is old is that the back is stamped "Walt Disney Productions". By the time pin trading began the name of the company had already been changed to The Walt Disney Company.
The first pin (#39451 if you want to search it on pinpics.com) is part of the Magical Milestones starter set. It was released in 2005. The other (#1362) has a bit of interesting history, was released in 1985, and is much more "valuable" in terms of money--assuming you find a buyer.
I loved the Magical Milestones pins and have a couple, my favorite being the ticket book, but I don't remember seeing the Tinker Bell one. Maybe it is rare. I have the Main St version of the second pin. I wear it on the bottom of my lanyard to keep it together. I remember when I got it I was so disappointed that it wasn't Fantasyland. I was only 12 or 13 and Main St wasn't very exciting to me. Now it is one of my favorites and I'm glad I kept hold of it over the years.