There's a lot more to tiling then they show on those silly DIY shows so make sure to do some research before starting.
TheFloorPro.com - Ceramic & Stone Tile Underlayments
I use a carbide scoring knife that sold in the tile dept. at any Lowes or HD there only about $5.00.
But first you have to check out what's under the floor to be laid to make sure it will even support tile without cracking. If it's partical board, louon, or linolium it's all got to come out first.
For a floor there has to be a bed of thin set (never ever used premixed thin set) to set the tile board into then it gets screwed down with tile board screws. Just look at the screwing patterern on the board for screw placement. It's going to take a lot of screws. A cordless drill is going to take forever and a lot of batterys. We use impact screw guns to do it.