can you tile over old tiles with ceramic tiles and the old fashioned sticky type tiles as they are hard to get up in some places

if they are stuck down well yes

It's easier to take them up first and last rather than have problems in the future

Yes, you can tile over old tiles with ceramic tiles. However, it's essential to prepare the surface properly. Roughen the old tiles, clean them thoroughly, and use a bonding agent or primer before applying the new adhesive and tiles. Keep in mind that this method adds thickness to the wall or floor, which might affect things like door clearances. Consider consulting a professional to ensure proper installation.