How To retrive store sender name and email address : you can check below code
General Contact
/* Sender Name */
Mage::getStoreConfig('trans_email/ident_general/name');
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_general/email');
Sales Representative
/* Sender Name */
Mage::getStoreConfig('trans_email/ident_sales/name');
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_sales/email');
Customer Support
/* Sender Name */
Mage::getStoreConfig('trans_email/ident_support/name');
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_support/email');
Custom Email 1
/* Sender Name */
Mage::getStoreConfig('trans_email/ident_custom1/name');
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_custom1/email');
Custom Email 2
/* Sender Name */
Mage::getStoreConfig('trans_email/ident_custom2/name');
/* Sender Email */
Mage::getStoreConfig('trans_email/ident_custom2/email');