Excellent advice above from Maintain and Loki as usual.
As for being to old for law school, the answer is nobody is ever to old, but obviously the older you are the less time you have to recoup your law school investment. As everyone has stated, starting out in the legal profession is difficult your work experience certainly will not hurt you, but it wont' be that helpful as far as being a practicing attorney either.
Maintain makes a great point about LSAT scores and scholarships. You want to minimize costs as much as possible and if you have the option try to get in State-Tuition there are several schools throughout the U.S. that offer very cheap tuition for in-state residents. There are several schools in New York and Florida that offer cheap-in state rates, which are even better than scholarships. If you are not aware many scholarships at law schools are contingent upon you performing well, which usually entails maintaining a 3.0 GPA. 100% of law students are smart, motivated, hard working people that think a 3.0 easy, but law school is a whole different animal, because of the curve and at most schools only 35% of the class can get a 3.0, which means there is a 65% chance you and all your future classmates will not and if you don't maintain the 3.0 your scholarship goes away for 2L and 3L.
Then finally one thing I personally believe is that part-time law school is not a good bet, most people I know that enrolled part-time were not ready for the rigors of law school and failed out, which resutled in a big waste of time and money for them. People "can" do it as Maintain has, but it has been my experience that most part-time students don't succeed. I think if you really want to do it then jump-in fall time and focus on law school, if your not ready for that big of a commitment then law school might not be for you.
When I was in law school there were people in their late 30's 40's that went on to do well. One of my classmates was a long-time journalist for the San Francisco Chronicle, but he knew the newspaper industry was going down and he went to law school. He was 43 when he started law school, passed the bar, and is doing great, but he went full-time.
Also, this is a great article about choosing a law school. http://www.legalmatch.com/choose-the-right-law-school.html
Good luck whatever you decide!