Reformatting lenovo laptop without driver disc?

The laptop did not come with disks. Instead, it has a factory restore partition which is normally hidden which you access at boot time using a specific set of key commands. Look up your laptop model and "faccory restore" and you will find instructions on how to do this.

Once you have restored your machine you can and should make a set of factory restore DVDs which you will need if your hard drive ever fails. This will probably be in one of the Lenovo folders. Burn the DVDs and then make a duplicate set to keep in a secure and different place.

The lenovo site should have all the drivers that wasn't install for your laptop normally all manufactures put them in the driver and downlaod support site in case a owner loses their driver cd

Well you can format your laptop… But you need to check the lenovo website to check if the drivers are available for your model and also check whether 32/64 is available before formatting