1210 Calories too low?

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Ok alot of people are saying that is too low of calories to lose weight? Ive never done this before so...I just wanna lose 5 lbs or so and tone up . Im 5'9 and weigh 130. Thats the amount this site put me at. Should I do 1400? Right now Ive only been walking briskly for 30 min everyday at work on my lunch..but plan on doing my new exercise video 3 times a week thats a fat burning video starting tom. Anyone else my weight and height that has tips? :)