toshiba c855d laptop help

can 1 of you guys post a link to the 1 I need .. hate to get the wrong 1 lol..I have the disk from my computer that I made when I got the computer how can I make sure that it has everything I need on them ..I think it 3 or 4 total...I saw some on ebay for 7 8 dollars but I think I have what I need just trying to make sure before I waste money and don't have everything I need to fix it..