Hi Glenda, if it wont let you change directory it sounds like a hard drive problem.
I assume that you made a 98 boot disk, if so can you run FDISK at the A prompt, that will tell you which size and how many partitions, if any are on the hard drive.
Can you get it to start up in Safe Mode by pressing F8 repeatedly as it boots up ?
Do you know which OS it had on when it was being used by the person who gave it to you ?
I am wondering if it was on 2K or XP or something using an NTFS formatted drive, that would prevent you being able to put 95 or 98 on as they will only be able to use FAT 16 or FAT 32 formatted drives