Try below code to get currently loaded product id:
$product_id = $this->getProduct()->getId();
When you don’t have access to $this, you can use Magento registry:
$product_id = Mage::registry('current_product')->getId();
Also for product type i think
$product = Mage::getModel('catalog/product')->load($product_id);
$productType = $product->getTypeId();