how do you get the 1000ft in flight audio, you know: 1,000, 500, 400, 30, 20 land this type thing?
You're best off making your own thread for each question as Master Chief has their own queries too! It is called a GPWS (Ground Proximity Warning System). There are many tutorials, and many of those will point to a program called FSUIPC.
The runway markers are probably built into the texture or design of the actual runway. Most likely the design. Unless you're going to get a bespoke airport, I would think it be unlikely to have an addon do it for you. You may have to look at downloading certain scenery that have the markers, or edit it yourself. That is just my guess though.