Magento page limit session

$limit=Mage::getSingleton('catalog/session')->getLimitPage();

Get product attribute’s select option id/label/value in magento

$productModel = Mage::getModel('catalog/product');
$attr = $productModel->getResource()->getAttribute("color");
 echo $color_id = $attr->getSource()->getOptionId("Red");

Magento toolbar use in custom product calection

    $toolbar = Mage::getBlockSingleton('catalog/product_list')->getToolbarBlock();
       $toolbar->setCollection($_productCollection);
       $layout = Mage::getSingleton('core/layout');
       $pager = $layout->createBlock('page/html_pager');
       $toolbar->setChild('product_list_toolbar_pager', $pager);
       echo $toolbar->toHtml();
       $this->getToolbarHtml() eta comment kore ei code lagabe

Magento Get product attribute 'option label'

<?php echo $product->getResource()->getAttribute($attribute_code)->getFrontend()->getLabel($product); ?>

How to get random product of a category in magento

$collection->getSelect()->order('rand()');