i have to clean up some tiles mainly floor tiles and wondered if anyone could kindly advise re a product name and where to get / price etc. please

there is some gloss paint on some of the tiles and other general marks etc.

If the tiles are quite smooth then a wallpaper scraper and a bit of elbow grease works quite well.

then a good scrub down with one of the many floor cleaning liquids such as Vim

you could also try some mineral spirits/ turpentine ( narm mun son น้ำมันสน in Thai ) for stubborn bits.