Charge the battery up, you have now flattened it. Were you using the choke when starting? When you get a new bike, you have to learn what it likes when starting, some need choke, even in hot weather, some never need it. Most like a little throttle, but some won't start unless you keep your finger off. If you can't find any combination that works, you may need to clean the carb. I would be tempted to check compression though, bad starting can be the first sign of compression getting low.