No. Reader is not the right program. To do what you want, you will need Acrobat (That is what comes with the typewriter tool).
Though you have Acrobat installed on your computer, you could do that work directly. Because your scanned PDF are just some images, you could not edit or fill the form. Of course,you can try this way.
1. Transfer scanned PDF to normal PDF using OCR Terminal, which will help you make the PDF editable in Acrobat. You can freely use this app to finish this step.
2. As Acrobat is too expensive, so you can try to Use PDF Form Filler, which can directly help you fill the form.However you need to pay little for it..
Then the work is done.
Though you have Acrobat installed on your computer,
Where does it mention that?
Thank you for your help.
I'll research this. Thank you