Start off with a precision of some sort, if you are going the fender knock off route
My squier I've had since 2006 and It still works great....the pickup hum is annoying as fuck though
You might just want to go for one of the cheaper active P-up models, like a lower end Schecter or Ibanez/Spector
Always start with a 4 string, and if you want the best prices you have to do a lot of research. Amazon, Musiciansfriend, Guitarcenter, etc....check em all out, in ADDITION to checking out your local Craigslist musical ad's and eebay.
If you are lucky, you could find a $400-500 guitar and snag it for $200, if it's slightly used, and so long as all it plays fine, thats np.
And once you get it, I suggest you head over to Studybass.com ..... amazing, if not the best, resource for beginning bassists on the web.
I am still a bit of a beginner myself, so I kinda have an idea of these things