Q: how do i link my iPad to my laptop when there is no wifi in my office

Use the white wire that came with the iPad ?

What is it you want to do.

Hotspot is for tethering the iPad to an iPhone.

iOS: Understanding Personal Hotspot

http://support.apple.com/kb/HT4517

Use Bluetooth to tether your iPhone, iPod touch, or iPad

http://www.macworld.com/article/1159258/bluetooth_tethering.html

How to Connect an iPad to an iPhone Via Bluetooth Tethering

http://techtips.salon.com/connect-ipad-iphone-via-bluetooth-tethering-25472.html

 Cheers, Tom