I’m have a model mc700ll/a MacBook Pro I bought an identical model and I want to put my hard drive in it but when I start it up it gives me a folder with a question mark in it

Clickhereand follow the instructions. If the drive contains Mac OS X 10.6.8 or earlier and you reach the third set of steps, insert a Mac OS X install disk.

If there isn’t an OS on that drive, use the install disk immediately.

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Read this: About the screens you see when your Mac starts up - Apple Support

If you see a folder with a question mark appear instead of the Apple logo, it means your Mac couldn't find a local or network-based startup disk. This can happen if the disk selected in the Startup Disk pane of System Preferences isn't available. Wait a few seconds to see if your Mac is able to locate the startup disk you specified.

If you still see a question mark after waiting a few seconds, use Startup Manager to start up your Mac, then select your startup disk from System Preferences.

If a question mark appears after you install a software update, select your startup disk again using macOS Recovery.