Can't log into Google Play Store or my Google account
Well, that sure looks like you have messed your device really well, I would suggest the better option would be downloading the stock ROM and flashing it over your device anyway there's also another option which you can use like get the apk file of the apps from sites like Android Police.

Google PlayStore,
Google PlayServices,
Google+

Install then over your device and I guess rest of the app can be easily downloaded over the Google PlayStore.