thinset trowel 1/4x1/4 or 1/4 x 3/8 x1/4
4" putty knife
small cleaning brush like for the kitchen sink
larger cleaning brush like for scrubbing floors
triangular joint scraper
straight edges or levels
You'll need sponges for grouting, and a grout float.
I use the margin trowel for scraping buckets and getting mortar out of the bucket. I use a putty knife for backbuttering tile and cleaning out things. The small brush is for cleaning the trowels and mixer. The big brush is for cleaning the bucket.
If you'll be doing walls, you'll need various lengths of levels. Most guys probably have a 32, 48, 78, and 8 footer.
You'll need something to cut the tile with. You may as well get a cheaper wet table saw and a set of nippers. Expect to pay about $50 for the saw.