Sky's the limit but for bare minimum crappie jig starts, what I suggest:
1. Inexpensive vise (under $20)
2. Bobbin to hold thread spool (careful, some cheap ones fray & break thread)
3. Small scissors (regular household will work if sharp enuf to cut thread & fibers)
4. Tying thread (start with strong, like size E rod wrapping thread)(red color is good)
5. Cheap clear nail polish for securing and finishing wraps.
6. Marabou feathers or rabbit fur zonker strips white, black, & chartreuse
7. Flashabou or Crystal Flash (optional)
8. 1/16 #4 hook plain ball no collar jig heads
I'm no expert, and welcome any corrections or additions.