Keith,
It's like entering a foreign country with a foreign language for me.
HDD? Solid State Drive? Repositories?

Rich and Keith,
Thanks for your advice.
It is putting lipstick on a pig as the Toshiba Satellite M70 is very old and slow. Currently it will not connect to internet at all on Microsoft Windows 8 due to not connecting through WAN Miniport (PPPOE) Error 651. It seems to be a modem issue in the machine itself (it keeps re-dialling for a connection and failing) and this may make the job impossible anyway?
I have wanted to try Linux for a long time due to various issues with MSoft. I like that it is free and also that it hopefully might be faster, smoother and have fewer regular updates I don't agree to, be more private, autonomous and less intrusive without linking me up with products I don't want. I read that it would speed up tired old laptops like the M70 so thought I'd give it a go.
I'm happy to download and boot whichever system is best for the M70 in your opinion to make it serviceable mainly for just browsing the web and watching You Tube films.
The one I have put on the D Drive is the basic Mint, I think, but I can delete that and download another.
I would first want to remove Microsoft Windows 8 from it altogether and install Linux mainly to see how it works and if I get on with it if that is possible.
The BIOS system on the M70 is likely to be old too.
Thanks

I am installing Linux Mint on a Toshiba Satellite M70-343 laptop.
I recently bought it second hand from EBay and it is currently running on Microsoft Windows 7 Professional very, very slowly and I cannot access the internet as it does not seem to connect to my Three broadband connection at home with a router plugged in to the mains.
I first downloaded Linux Mint onto a DVD drive on my Toshiba Satellite L50-c-150 laptop.
I have bought a 64 GB flash drive from Argos and am ready to put it into a USB port on my L50-c laptop.
What do I do now to install Linux on the M70?
Many thanks for your help in this matter.
Garry