Have you bought a sighthound collar? They need wider collars than normal due to their slender necks. Meggie Moo makes the best ones around, and will size to a suitable one for your pup. I like martingale collars as they won't slip over the dogs head.
You'll need a bed as well - the Milgi one lets you just fold a single duvet to go inside which makes keeping them clean easy. Bowls, food, poo bags, Simple Solution pet accident spray, big roll of kitchen roll, the Perfect Recall book, gundog whistles for recall, and you should be good to go. When the weather gets cooler, you'll need dog coats for them as well
They are adorable. My friend has one. They like beds that they can burrow in - Charley Chau make one. Hounds love to burrow. My dachshund - of a diff breed but part of the hound family - likes to put his snout in my arm pit.
They are quite whiny I gather - I got my dachshund the same time as she got her puppy and she had loads of sleepless nights as hers cried in the night a lot.
As with any puppy, expect early morning toilet trips, frequent toilet trips and puddles. It does get better though. Mine dachsie is nowhere near toilet trained - he'll go but if he had his way, he'd be going inside - but it's so much easier than it was.