Looks like there is a password set on the BIOS - if you are comfortable going inside the machine and swapping over a jumper you can clear the BIOS to start afresh but its probably not going to help your problem at the moment.
Do you have a Windows 95 CD? You said you tried to reinstall but nothing would come up - how were you trying to do that? Do you have a boot floppy?
If you are happy to loose everything on the hard drive you can do a clean install of Win95 (though Win98SE would be a lot better - any chance of obtaining that?) but you will need a boot floppy. If you have access to a Win98 machine you can create a "startup floppy" which would be ideal to use in your machine. Go to Control Panel, Add/Remove programs and there is a tab for 'startup disk'. If not you can download a boot floppy from www.bootdisk.com
Here is my blurb for a Win98 install, just put 95 instead of 98 in your case:
Then these are the steps I would recommend:
1. Boot from the startup floppy with CDROM support and at the A: prompt type "FORMAT C:" without the quotes. If you are sure answer "Y" to the warning.
2. Put the Win98 CD in the CDROM drive. Because of the way the startup disk boots this will most likely be your E: drive.
3. At the A: prompt type "C:" (no quotes) return, then "MKDIR WIN98" return. This should make a new directory on your hard drive called WIN98. Check this by typing "DIR".
4. At the C: prompt type "E:" then DIR, you should see several directories listed including one called WIN98. If not you are on the wrong drive and you need to try different drive letters until you find your CDROM. When you see WIN98 type "CD WIN98" then "COPY *.* C:\WIN98". This will copy the contents of the Windows folder to your hard drive (which makes installation and future changes easier).
5. When the copy is done type "C:\" then "CD WIN98". Do a DIR to check there are files ending in CAB present. then type "Setup".
6. Now you are in the Windows 98 installation program and you follow the prompts.