Hi,
1. You can do so with a language override for the string PRICE_BEGINNING, i.e.
More on language overrides see in the documentations for HikaShop and Joomla.
2. Such messages are displayed in the main content area of your template. If that's far down on your web page, then probably because you have a lot of content in positions above the content area. So, no easy solution without changing your web page content significantly.
(Having said that, I wonder if there isn't any extension or so which displays such system messages i.e. in a temporary popup. Haven't investigated myself, but if you come across one, sharing the info here will be appreciated!)