Yeah, it's guarateed that you'd need new spokes, at least for one side; but then using 18 new and 18 used spokes would really be half-assed. So you will need new spokes.
If it's a good rim and you are somewhat mechanically inclined then rebuild it yourself as per

sheldonbrown.com/wheelbuild

It's a nice learnig experience and a basis for boasting.

Otherwise, buy a complete wheel because any US LBS will charge you an arm and a leg for a wheelbuild, so you're better off buying a complete wheel and selling this or keeping it as a spare.