If you don't want to spring for the Upgrade Package, I would at least buy the monster balance wheel . The machine comes with a spool of V-69 thread . And I suppose that's adequate for many jobs. I use the V-138 thread. Oh, I only use white Dacron thread, too.
Colored thread contains dye.
And this dye seems to break down the thread's natural durability. I've not bought one yet. And not sure I really need one. If I was sewing a dozen zippers, I might want to have a zipper foot. So you'll might want to decide on this later.