Is it possible to port straight talk service into an Iphone 4s?

I recently bought an iPhone 4s from ebay. It was run by verizon by the original user. The iPhone no longer has service, and i was just wondering if there was any other way to activate the phone using a straight talk phone card? To enable it to have an unlimited amount of data/minutes. Or is there any way to activate it to straight talk?

I'm locked out of my iPhone and can't restore it?

I forgot my iPhone password. When I went onto forums it said to restore my iPhone so I went to do that but it said 'Go to iCloud Settings on your iPhone and turn off Find My iPhone before restoring your iPhone.' Obviously I can't do this because I'm locked out.

Should I use UpgradeSwap or Usell to sell my iPhone 5?

The phone is in mint condition for Verizon. I would really like to avoid selling on craigslist, because I've heard too many scary stories about people getting robbed and meeting some very shady people through craigslist. Has anyone ever used upgradeswap or usell to sell a phone?

What is the cheapest carrier for an iPhone 5C?

I only need 1GB or less and I need the cheapest plan ever on any cheap carrier because I need to stay on a budget. It can be unlimited talk and text but please tell me which carrier is cheap for the iPhone 5C and the requirements I just gave.