There are 2 versions of the Canning Station, one is Base Game and one is Free Time, so delete the one you don´t want. All fences requires any expansion pack to work. Have a nice weekend. =)
For Stone Steps (modular stairs) you will need installed Numenore´s Scriptorium and put 6174_Veranka_OldMill_StoneSteps.txt file to "Program Files\EA GAMES\The Sims 2\TSData\Res\Catalog\Scripts\Scriptorium
For the Wheel Base you will need any invisible floor tile (I have included this one by moonlight_muse, thank you!).