It can be done by two ways, but first of all, for what do you need such configuration? It is illogical. 1 is a minimal required value. You will not be able to add 0 products.
Any way:
1) Change the language variable. Go to the Administration -> Languages (in your backend). Find "Minimum quantity for" using the search. You will see something like this:

Change the value to any text you need (For example: "Minimum quantity is [quantity]")
2) Open this file: stores/[YOUR_STORE_ID]/skins/[YOUR_SKIN]/customer/common_templates/product_data.tpl
And find this code:
{capture name="min_qty_`$obj_id`"}
{if $min_qty && $product.min_qty}
<p class="description">{$lang.text_cart_min_qty|replace:"[product]":$product.product|replace:"[quantity]":$product.min_qty}.</p>
{/if}
{/capture}
You can change the language variable to your or change this code as you wish.