I can't help you with changing the default settings on your camera, but I can comment on the formats you mention.
"Some while ago, it was said that it was best to record in TIFF"
These days fewer and fewer cameras use the TIFF format as RAW becomes more popular. It all depends on what you want to do with your pictures. If you are only interested in taking holiday snaps and taking your memory card down to Boots for printing, then one of the higher quality JPEG formats would be ideal, I think I would give the lower quality JPEGs a miss though. However, if you're into post processing and getting the absolute best from your camera, then you should go for RAW, but you will need a RAW converter or plugin (there are one or two that can be downloaded for free). I don't have the TIFF option in my camera and I don't really see why I would need it. TIFFs will take up more than twice the space on your memory card compared to RAW, and at least four times the space compared with your highest quality JPEG.
Hope this helps