No, the Nikon D80 has an in-body autofocus motor, since the D80 was not an entry-level or economy model Nikon body. The D70 and D80 and D90 will autofocus with ALL the AF Nikkor lenses,and with ALL AF lenses made by Sigma, Tamron, Tokina, Quantary, Vivitar, Phoenix,etc. if the OP is on a really tight budget, the older 100mm f/3.5 Phoenix macro in Nikon mount is an option, probably available used or new-old-stock for $100 N-O-S, $80 used.
And yes, the Tokina 100mm AT-X Macro is often overlooked, even though the company was founded many years ago by a group of former Nikon engineers and employees. Tokina lenses typically have the more neutral color cast that Nikkor lenses have, so Tokina lenses mix better with Nikkor lenses than say Sigma lenses do; Sigma lenses have a warmer color balance than Nikkor lenses do.