Re: Qaza for Witr prayer
No, you're not supposed to pray qaza namaz missed over your lifetime. To the best of my knowledge, you gotta have a valid reason for missing your salah to make it up and not merely because one decided to be lazy throughout his/her life and now wants to make it up.
Perhaps someone else can shed some light on it, if not then I'll try to gather some evidence on it. In fact, you should do a search on it. I'm positive that it's been discussed in detail in the past.