Yes, you will need to enter your last year's AGI to e-file.
The Signature PIN is called the Self Select Pin. It's five digits that you make up yourself. It doesn't have to be the same as last year. It's part of the electronic signature process.
The IRS does not require you to enter a drivers license, but its recommended to help fight identity theft. You should be able to just continue through that screen without entering anything or select no license.
There is another PIN called an IP Pin. This pin is entered in the Other Tax Situations section of TurboTax. But, you would only enter it if you have been assigned one by the IRS (it's for victims of ID theft).
