You cannot realy disable vlan 1 because it is the default vlan and even if you don't use it the switch still does. The steps you need to take to stop using vlan 1 -
1) remove the int vlan as per Sandeep's instructions
2) assign all ports into different vlans
3) change the native vlan on your switch to a vlan other than vlan 1. The native vlan should be a vlan that you do not assign any ports and it does not have a L3 SVI ie. int vlan xx
4) you can also clear vlan 1 off your trunk links but as i mentioned earlier the switch itself will still use vlan 1 to send it's own control protocols.
Be aware that all ports are in vlan 1 by default so you must do 2) to make sure vlan 1 is not being used.
"İ do this interface range fastethernet 0/1 -2 , gigabitethernet 0/1 -2
Switchport access vlan 2
Switchport trunk native vlan 2"
You do not need a native vlan if you have your switchport set as an Access port. Native vlans are needed for Trunk ports.
switchport trunk encapsulation dot1q
switchport mode trunk
switchport trunk native vlan 2
You also need to make sure that the native vlan is the same on both ends of the trunk.
As for interface Vlan 1, Peter is correct. You cannot delete interface Vlan1, only shut it down.
Hope this helps