Can't help on loud ringtones. Check the Media section of the Forums.
For a user guide, I suggest using Google and searching for it. Can be easily found. A link is also in our FAQ: Where can I get my device user manual? - BlackBerryFAQ
If you wish to sync your device with Outlook contacts and calendar, then you will need Desktop Manager. If you have Windows XP or Vista and Outlook 2000 or earlier, then use DM 4.2 SP2/SP3. If you have Windows XP or Vista and Outlook 2003/2007, then 4.6 or 4.7 should work That info is in our FAQ: BlackBerry Desktop Manager Downloads - BlackBerryFAQ
. If you have a MAC, then you need either PocketMac or MissingSync. Check our MAC section.
Email is pushed about every 15 minutes. This is how the BB works and the beauty of the BB itself. There is no manual intervention to access it when you wish.