T-Preamp TCC TC754 - 3 inputs preamp with MM phono stage - [English] this is the cheapest decent one I know of but there are DIY kits as well. The best budget favourite at the moment is the Cambridge Audio 640P which is a bit pricier. These things are really expensive in general actually and you might alos want to check out the goodwill or craigslist for an old amp or reciever as anything older than the 1990s will have a phonostage as standard.
A new belt shouldn't cost you much, 15 USD from New Replacement Belts for Pioneer Turntables. Turntable Basics. Parts and Accessories for Record Players. Turntable Belts and Idler Wheels.. It's worth checking the sizes against your existing one just to be sure they have it right.
You should be able to get it going with the existing belt just to make sure the motor isn't burned out before spending any money. Does the platter where the record sits spin freely? Try lifting it off and removing the belt and giving it a spin. You'll want to clean and re-oil the main bearing on a deck this old.
Phonopreamps.com TCC TC-760LC Details and Hookup
I'm also getting into DIY. what phono stages/preamps would you recommend thats worth the time? or better then the one you and I listed.