8 track to amplifier possible ?

You can amplify the output of the 8-track, just as others have said. You can use a high to low level adapter, or simply buy an amplifier with built in high level inputs. However, you might not be all that happy with the results, so proceed with a bit of caution and have relatively low expectations of the final results.
The 8-track player you have already has a built in amplifier. When you connect another amplifier after the original, it will amplify all of the signal it's fed, including the noise (hiss) from the original. The 8-track systems of the day were never known for their high performance audio characteristics, so I would expect a fair amount of noise to get amplified along with the music. It's also possible that you may end up with some alternator noise, since the output of the 8-track can create a ground loop between it and the input of the new amplifier. This is a correctable problem, but it will take someone with some audio troubleshooting experience to fix it. These potential issues may or may not matter to you, they're just things you should be aware of before spending money on an amplifier.
Another idea would be to add an amplifier with a Bluetooth input so you could simply stream music from your phone or whatever directly to the amp. It would cost roughly the same, and end up sounding a whole lot better than the 8-track.