All vehicle kits should include T.P. and babywipes . Mechanics gloves are also a good idea , save a lot of hurt to the hands . A hammer of some kind is also an asset . As are black iron wire , a few worm gear clamps - assorted sizes , and a pair of linesmans pliers .Chris
Get yourself a good multitool to live in the trunk or glove box and a bigger/more powerful flashlight. I'd suggest something like a full sized SwissTool or Leatherman ST300. For a flashlight, get something that runs on AA's or AAA's as they can be replaced easily enough.Def
This reminded me of Dexter's kill bag&tools