Magento – How to get store admin email address and name in Magento 2 in a Block

For logo:

There is an email var for that:

{{skin url="images/logo_email.gif" _area='frontend'}}

To make it your own, upload and replace logo_email.gif

For email variables:

Some of these exist by default:

General Store Email address:

{{config path="trans_email/ident_general/email"}}

Store Name:

{{config path="general/store_information/name"}}

Store Code is trickier. This is not exposed in the config to my knowledge for use by the email templates. I suggest using a custom template file, and refer this way:

{{block type="core/template" template="custom/storecode.phtml"}}

storecode.phtml:

<?php

echo Mage::app()->getStore()->getCode();

Alternatively, and maybe less-desirable, are Custom Variables.

Custom Variables

System > Custom Variable > Add New Variable

To Implement a custom variable into a Transactional Email, do the following: In the Admin Panel, select System > Transactional Emails Click the row of predefined template to edit or click [Add New Template] button to create a new one. Create a new transactional email first if needed. In the Template Content field, select a location for your custom variable. Click [ Insert Variable ] and select the Custom Variable you would like to insert.

_{Source: http://www.magentocommerce.com/knowledge-base/entry/creating-custom-variables}

I know that you can include static blocks using e.g.:

{{block type="cms/block" block_id="static-block-id" }}

That block simply uses _toHtml() to output the content from the static block.

protected function _toHtml()
{
    $blockId = $this->getBlockId();
    ...
    return $html;
}

Similarly, you could try and populate the _toHtml() function with HTML in your module to output what ever you need to output. You cannot use PHP variables such as $order to pass in your data for processing.