sorry you're having issues fine69,
after i entered my google login and also made sure unknown sources was ticked, my apps started downloading.
in the initial setup (you can restart this) it asks you if you want to use google servers to back up or htc (the htc backup uses your free 25gb dropbox storage by the way). so if you chose htc backup this could be the reason why your apps did not immediately download.
also make sure you are logged into the correct play store account.
if you are overseas and not in the US, things could be different, but this phone behaves just as prior htc phones ive used.