You asked
What lenses should I buy for the fujifilm x100t?
The Fujifilm X100T doesn't take separate lenses. Its 23mm f/2 lens is built in, and on full frame it frames like a 34mm. You can read the full Fujifilm X100T page for its specs.
If you want to change lenses, you'll need a camera with an interchangeable-lens mount. For most people that means a mirrorless body with a kit zoom, and the first camera guide explains why. Before you commit, check the three questions to make sure the lenses you'll want exist for that mount. If you're shopping secondhand, buying used covers how to avoid bad deals.
Written by Claude from this site's pages.