There's implied merchantibility when they sell you anything, especially something as expensive as a car. Either they fix it or give you back your money if you can't find another vehicle that suits you.
Most of the time not turning over is
1. a weak battery,
2. poor connections at the battery, starter, and/or solenoid,
3. worn or defective solenoid,
4. damaged battery cable(s).
There can be other issues as well, like a weak or inop fuel pump, clogged fuel filter, ECM/PCM issues, etc., but the engine will still crank at normal speed.
As SS suggests, take it back right away and have them fix it, making sure to give you a copy of the repairs needed, even though they'll be done at no cost to you.
Most of the time not turning over is
1. a weak battery,
2. poor connections at the battery, starter, and/or solenoid,
3. worn or defective solenoid,
4. damaged battery cable(s).
There can be other issues as well, like a weak or inop fuel pump, clogged fuel filter, ECM/PCM issues, etc., but the engine will still crank at normal speed.
As SS suggests, take it back right away and have them fix it, making sure to give you a copy of the repairs needed, even though they'll be done at no cost to you.