Have owned and used two different Brother embroidery machines for over 15 years....I have used almost exclusively C&C embroidery thread. There are two different kinds, either Rayon or Polyester, Rayon has more shine, polyester will stand up to bleaching (excellent for baby and childrens clothes and stuff). Sulky makes a nice embroidery thread also, and is nice because it comes on small spools. You will need embroidery needles, I use Schmitz, available at both Joann and Walmart. Now you will need at some point in time software for your computer, but not right away.
How old is your machine, does it have a card slot and let us pray a USB port ?????? if it has a port you are golden and will not need cards. Did you get a dongle ????? Did you get hoops ???? you will need stabilizer, inexpensive and available at Joanns....I would love to help you more just PM me....