[chamberinternet]

The messages "Set your own price!" can be removed from the templates. I think you're using 4.4.x with the 2 column layout,
So open up product_t.tpl (I think located in /skin/common_files/customer/main/) and look for the following code:

<span class="price">{$lng.lbl_enter_your_price}</span><br />
{$lng.lbl_enter_your_price_note}

commenting out the above code will prevent the text from appearing.

Secondly, in the detailed details of the product how do i remove the "the "Our price" and Text field.

Open up product_details.tpl (again, located in /skin/common_files/customer/main/) and comment the following snippets of code:

Around line 95

<td class="property-name product-price" valign="top">{$lng.lbl_our_price}:</td>

and around line 105

<input type="text" size="7" name="price" />

HTH