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The only place to get all 3 FICO scores together are via myFICO.com. There are a couple other places to get FICO scores, and those include Equifax.com for EQ only, transunioncs.com for TU, and PA State Employees Credit Union offers a FICO score for EX, I think (could be wrong, maybe EQ or TU).
Unless I am missing a source, any other site that offers credit scores do not offer FICO scores. These other sites (like TrueCredit or via BofA, PrivacyAssist I think is the name) offer FAKO scores or fake scores. No lenders use these scores and ignore them. Ignore the advice too. There's also no correlation to these scores. My FAKOs have gone up and FICOs down, and vice-versa.
Many lenders, my bank included, use a FICO score for loan products, including car loans, but many use an auto-enhanced score. In other words, car lenders will often use a version of the FICO score that targets your past auto-borrowing history and will weigh more on that vs. CCs. After you apply with the auto lender, you can ask for a copy of the score to see if it equals any of your FICO scores.
Check out Credit Scoring 101.