To be truthful, painted tiles? - No. They look what they are and, if you scratch one it looks tatty in an instant. There are loads of laminates available, plain colours, even sparkly colours, some look like tiles, granite, marble, brushed stainless steel - even quirky ones like rippling water over sand or pebbles, you could cover tiles with some of that, it's not that expensive. Or put up a batten, or use strong as nails glue cover some chip/hardboard with fablon and cover under cupboard areas with that. As regards Kitchen/bathroom paint - it isn't really necessary unless you get a lot of condensation on your walls.