I assume that you have burned Ubuntu to a CD or a USB stick. You need to enable the computer to look for other boot devices than the hard disc first. This can be a bit technical. You will need to enter the BIOS, which is a menu controlling hardware of the computer. If you are not experienced with this, I would recommend that you find someone, who is, or look closely in the handbook following the notebook for instructions. What needs to be changed is the 'boot order', making sure that the CD drive (or USB) is checked before the hard disc.
Concerning wireless, it should tell you that there are wireless coneections available, when you open the computer. After entering the password, it should work. There is a guide here: https://help.ubuntu.com/12.04/ubuntu-help/net-wireless.html
Similar for Bluetooth: https://help.ubuntu.com/community/BluetoothSetup