Not so many questions at one time

Let's take things step by step.

Are you familiar with Linux? ... Knoppix?

Take out those papers you received from your vendor when you bought that laptop.

There will be detailed info about your Graphics Card's make, every single detail.

Go to AMD website and search for the appropriate linux driver file.

Download it. Save it where it is going to last really long.

Then use 'knoppix64 2", the one your wrote as cheatcode.

Once reached there, type and go to where you saved the driver, at the terminal.

Run the file.

Follow the instructions displayed by the driver while installing.

After it's over, you could try startx.

See what happens.

If the graphics is okay and the system works, restart and make a persistent image.

You have to install the driver over again if you didn't have a persistent.

Follow all instructions on Knoppix website meticulously.

Good luck!