This is a bit ambiguous. The user might mean replacing each term (i.e., each word) with three options where possible. But that could lead to a lot of spintax in the text. Alternatively, maybe replace each key term in the sentences with spintax.

- FREE → No-cost - available → provided - download → retrieve - saving → saving Panasonic Kx-p1694 Windows 7 Driver -FREE-

Possible substitutions: "popular" → well-known, "dot matrix printer" → impact printer, "widely used" → frequently employed, "various printing needs" → multiple print jobs. This is a bit ambiguous