You can recieve messages from VK using /get command. And answer to them by Reply button in Telegram.
To start you have to set your token and webhook_url in config. Next set up your database user,pass and so on. In index.php set your client_id accroding to yours VK App ID. After that you should run bot with /start command. Use: /start Next get access_token from url and use /token <access_token>
Warning! Only you can recieve and send messages. If somebody else use bot they get nothing. Cause it's VK API's trouble