Do you mean you only have a local snapshot or you have a TM backup drive that was up to date except for the snapshot on your machine?
You cannot restore a whole machine from just the local snapshot (think about the space required...), the snapshot is only changes since the last TM backup to the TM drive.
As far as I know you will have to let TM complete another backup run, which will move the local snapshot to the TM drive, you can then restore your data via TM, up to and including the whole machine. One point to note is that it will probably restore your machine to the latest "data deleted" state if you do a complete restore, you would then need to go back via TM to the last "with data" snapshot time and restore what you deleted from there.