Laptop Charger

My laptop charger finally died over the weekend. Is this something I can easily replace? DO I need to go back through Toshiba, or can I just pick up something generic from an electronics store.
What information do I need to have with me? And what sort of cost am I looking at?
Thanks in advance.
What information do I need to have with me? And what sort of cost am I looking at?
Thanks in advance.