There is no obvious answer to lamp time. The lamp inside is not guaranteed typically beyond 90 days. So, it can go ANYTIME after 90 days and not be covered by any warranty. Since environments and usage greatly affects lamp time, I would expect that you may see anywhere from 1,000 - 5,000 or so hours. More may be possible, but I wouldn't bet on it. Lamps are just a huge variable and your first lamp may last 7,000 hours, then your second lamp may last 1,000 hours in the same room and the same house and the same usage.
I recommend that you be ready with a spare bulb as the hours get up there or if the image starts to dim.
Your TV is definitely HD ready. Looks like it has 2 SCART inputs which I'm not to familiar with, but they look like a version of component RGB or some such. The display itself is Wide XGA which is either 1365x768 or 1280x720. Either way - HD ready. All you have to do is feed it a HD source to be watching HD television. It does not have an INTERNAL way to receive HD television, it must be supplied by an external source like cable or satellite.
To hook up a HD source, you need:
1. An HD source (cable, satellite, over-the-air HD receiver)
2. A SCART to RGB adapter or the correct cable. If you are in Europe, then your local A/V stores will have the right SCART adapter. What you have right now is SCART to composite video which is not enough to carry HDTV on.