To convict someone of Petit Larceny, the prosecutor must prove
That someone took property belonging to another and carried it away; and
That the taking of the property was against the will and without the consent of the owner of the property; and
That the taking of the property was with the intent to steal the property; and
That the property taken had some value.
Each of those elements can be difficult to prove and there are many potential defenses available. You need an affordable attorney who has your interests at heart.
Petit larceny is a class 1 misdemeanor. That means it's punishable by up to 12 months in jail and a $2,500 fine. You are unlikely to receive the maximum sentence. If it's a first offense, you will most likely receive a fine or a suspended sentence. If you've been convicted of larceny before, you might receive a small jail sentence.
It depends on your job. Many jobs require that you submit to a background check and a conviction for larceny can disqualify you from some jobs. It's best to be honest and forthcoming on job applications. The more time that has passed since the conviction, the better you will be able to separate yourself from the conviction.