TurboTax does not have a copy of the W-2. It would have a Wage and Tax Statement worksheet that included the information from the W-2 and emulates a W-2. The worksheet would be included in the PDF of the tax return if you downloaded the PDF to include All forms and worksheets in the tax year the return was completed.
If you cannot obtain the W-2 from your employer, then for a fee of $37 you can get a complete copy of a W-2 from the Social Security Administration - https://faq.ssa.gov/ics/support/KBAnswer.asp?questionID=3836
You can get a free Wage and Income transcript from the IRS by completing a Form 4506-T - http://www.irs.gov/pub/irs-pdf/f4506t.pdf
See this IRS website for transcripts - http://www.irs.gov/Individuals/Get-Transcript
For a fee of $50 you can get a complete federal tax return to include copies of W-2's from the IRS by completing Form 4506 - http://www.irs.gov/pub/irs-pdf/f4506.pdf
See this IRS Tax Topic - http://www.irs.gov/taxtopics/tc159.html
It depends.
If your employer at that time is still in business, you should try to contact them first to see if they can send you a copy of your W-2 Form from that year.
If you are unsuccessful there, you can always refer to the following information on the IRS website. You can either request a copy if you submitted a copy of your W-2 with your tax return. Or you can contact the Social Security administration to request a copy as well.