If you want bbm you will need the add-on sorry.
The options below will work with £10 goodybag with no bbm
How to Giffgaff a Blackberry (blackberry internet settings) - http://bit.ly/giffgaffblackberry
Blackberry app world & Blackberry Browser - http://bit.ly/ecXpIK
BBM and BB Alternatives - http://bit.ly/ekN2eN
Facebook & Blackberry - http://bit.ly/igz4hl
Why can't I browse the Internet? - http://bit.ly/i7dGhk
Blackberry smartphone Apps list - http://bit.ly/ggblackberryapps
Blackberry messenger alternatives - http://bit.ly/bbmaltgg
Advanced Blackberry usage - http://bit.ly/bbusagegg
Blackberry Config Tip - http://bit.ly/ggconfigbbtip
Blackberry Video tutorial for setting up opera mini - http://www.youtube.com/watch?v=e8MJGumj224
Unlock your blackberry for free - http://www.unlocks.co.uk/unlock_blackberry_free.php
Will bbm work with a normal £10 top-up? I don't know if you need the add-on or not to use bbm. Please reply asap, thank you!
To use BB Services you'll need to buy a goodybag and the BB Addon together, it can't be purchased on its own.
To have internet without an Addon, then you'll need to set up your phone according to this guide: http://community.giffgaff.com/t5/Learn-giffgaff-Top-Tips/giffgaffer-s-guide-to-Blackberry/td-p/92334