regards to the emails, if you are connecting to a business server at work for example you are best off asking the techies there to set it up. if you are a home user the emails may still be on the HDD if it is still functioning you could connect it to a pc and caddy and possibly pull the outlook files from the disk and import them to your new outlook.
regards to the BT Homehub, you dont need a disk, just use find out the name of the wireless network (possibly homehub or something alike) and use windows or the utility that came with the machine. with the homehub you will need the wireless security code usually printed on the back of the homehub.
Please post the make and model of the hub if you need anymore help.
hope ive helped.