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My quick time player, app store, and several other apps have become inoperable. I have tried to upgrade my software form OS X Maverick 10.9.5 to Yosemite in hopes that it would resolve my issues but as i previously stated i can't access the app store to obtain it. Any help in this matter would be greatly appreciated.
You probably ran a defective third-party "utility" such as "CleanMyMac" or "MacCleanse" that purports to "clean up" "junk" files. What it really does is to corrupt the operating system and many applications.
The first thing you need to do is remove that software according to the developer's instructions. Never install it, or anything like it, again. Then see below. If you use any iWork applications, you may need to delete them and redownload them from the App Store.
If you don't already have a current backup, back up all data, then reinstall the OS.* You don't need to erase the startup volume, and you won't need the backup unless something goes wrong. If the system was upgraded from an older version of OS X, you may need the Apple ID and password you used.
1 inoperable
2 upgrade
3 software
4 issues
5 access
6 defective
7 applications
8 instructions
9 install
10 redownload
11 reinstall
12 password