Adding the image of each product is quite complex as you first need to load the data from the database and then use it to construct the link to the image and display the proper HTML.
Removing the prices is more easy. Just remove the lines:
<td style="font-weight: bold;"><?php
echo JText::_('CART_PRODUCT_UNIT_PRICE');
?></td>
</td>
<td style="font-weight: bold; text-align: right;"><?php echo JText::_('HIKASHOP_TOTAL'); ?>
</td>
<td><?php echo $currencyHelper->format($item->order_product_price+$item->order_product_tax,$data->order_currency_id); ?></td>
<td style="text-align: right"><?php echo $currencyHelper->format($item->order_product_total_price,$data->order_currency_id); ?></td>
and the block:
if(bccomp($data->order_discount_price,0,5)){
echo '<tr><td colspan="4" style="text-align:right">'.JText::_('HIKASHOP_COUPON').' : '.$currencyHelper->format($data->order_discount_price*-1,$data->order_currency_id).'</td></tr>';
}
if(bccomp($data->order_shipping_price,0,5)){
echo '<tr><td colspan="4" style="text-align:right">'.JText::_('HIKASHOP_SHIPPING_METHOD').' : '.$currencyHelper->format($data->order_shipping_price,$data->order_currency_id).'</td></tr>';
}
if($data->cart->full_total->prices[0]->price_value!=$data->cart->full_total->prices[0]->price_value_with_tax){
if($config->get('detailed_tax_display') && !empty($data->order_tax_info)){
foreach($data->order_tax_info as $tax){
echo '<tr><td colspan="4" style="text-align:right">'.$tax->tax_namekey. ' : '.$currencyHelper->format($tax->tax_amount,$data->order_currency_id).'</td></tr>';
}
}else{
echo '<tr><td colspan="4" style="text-align:right">'.JText::sprintf('TOTAL_WITHOUT_VAT',$currencyHelper->format($data->cart->full_total->prices[0]->price_value,$data->order_currency_id)).'</td></tr>';
}
$text=JText::sprintf('TOTAL_WITH_VAT',$currencyHelper->format($data->cart->full_total->prices[0]->price_value_with_tax,$data->order_currency_id));
}else{
$text=JText::_('HIKASHOP_FINAL_TOTAL'). ' : '.$currencyHelper->format($data->cart->full_total->prices[0]->price_value_with_tax,$data->order_currency_id);
}
echo '<tr><td colspan="4" style="text-align:right;font-weight:bold;">'.$text.'</td></tr>';