I am guessing that there was no proper software with the laptop, by that I mean no OS disc! It also would appear that the previous owner has not removed their personal info.
If that is the case, then I would advise that you will probably need to purchase an OS, like XP or Vista (though if it is an old laptop, Vista would not be any good), then install the new OS before anything will work properly.
But a bit more info would help. What RAM available, would be a start - then size of hard-drive for instance.