The Magnums all came with a "mini" starter unless you don't get one with the engine. Mid 90's Dodge RAM / Dakota 5.2 / 5.9 starter
You need whatever you'd use in an LA for a distributor for carb. "Keep the EFI" (thinks I)
Mags don't have a mech pump. Easy answer.........electric, rear mount pump
Consider keeping the EFI. There are ways to do factory, or use Megasquirt, and others.