Roberts,
Some comments:
- I wouldn't (if it were me) try to go through the tile, I'd be afraid of breaking it while either drilling it or putting the safe on it, then torquing the anchor bolts down.
- I'd go through the carpet, since the holes may not be even noticable after you remove the safe and move it into your new house (you are buying a house someday, I hope!).
- To drill in concrete, you'll need anchor bolts, a masonry drill bit the same size as the bolt and a hammer drill. A regular drill motor will work, but will take much longer and will probably burn up your drill bit (a regular drill bit will not work). Try not to break into the other side of the concrete, especially if you have a high water table.
I hope this helps.
Merlin