Toyota sewing/embroidery machine model 800

[newbie]

I took a chance at our local car boot and bought the above sewing machine. It is obviously fairly old but looked complete. Dead cheap! Anyway got it home and it works!! At least to do ordinary sewing. But it has embroidery capabilities and came with 24 different stitch pattern cartridges - I can see where they go but cannot get the disc that is in there out. It does not come with an instruction booklet. I have googled it but cannot find this particular model. Anybody got this machine that can guide me please or show me where I can get some info. Many thanks in anticipation.