you'll need :
x-acto knife, with a few blades
glue, I use "
super glue, control gel" it goes where you want, and is easier to use
paint, and Sharpies, they're easier to use, but have a limited range of color.avoid high gloss paint, makes everything to shiny.
minis, you can use any mini in the 25-28 mm size range. even metal minis can be used,but it's more difficult.
imagination, check others customs, and look at pics on wookipedia
1/16 clear acrylic rods made really good light sabers
have fun
it's a blast