ok, well, when you have it plugged in and battery in, it should have two lights, one saying yep I'm plugged into ac power, they other saying its charging the battery. If the ac power light is not comming on then you have one of two possible problems. One the ac adapter is bad and not powering the unit. two the motherboard is bad and not accepting power from the unit (on most toshibas it will be the motherboard since the dc in jack is soldered into it, but on some toshibas the dc in is seperate, but depends on the model)
i'd try the ac adapter first, universal ones will work, if you try a non-universal adapter make sure its the same volts and amps as your computer requires.
if it doesn't work, look on the bottom of the laptop and post the model # and part #, I can use those to look up your laptop and tell you about the dc in jack and motherboard if you wanted to know.