Draco doesn't save Harry, Harry saves Draco. When the Room of Requirement is on fire Harry pulls Draco onto his broom (Ron and Hermione save Goyle and Crabbe dies, however in the film Goyle will die...
No, he stays alive throughout the series, and in the epilogue we find out that he married Astoria Greengrass and had a son named Scorpius.None of the Malfoys die in any of the Potter novels.