My applications folder is empty and I can't run any software

If this is a brand new MBP that is only days old then make an appointment at the Apple Genius Bar for service. If you need to find an Apple Store - Find a Store - Apple. Let them fix it for you. You might even ask if someone can set up a Boot Camp Windows partition for you. Be sure you have or buy a full Windows installer.

If you don't have a new model then what model do you have? To find the model identifier open System Profiler in the Utilities' folder. It's displayed in the panel on the right. You may also find the complete model information by selecting About This Mac from the Apple menu.

You may need to search for System Profiler given your situation.

I bought it a week ago from today, but it was purchased from a best buy and I didn't get apple care. Should I still take it to an Apple Store or do I need to take it to Best Buy? Thank you for your feedback!!

You can take it to Best Buy. All Macs come with one-year warranty. You don't have to buy AppleCare unless you wish to extend the warranty by another two years. You are currently fully covered. Best Buy honors any Apple warranty.