I want to use my Ipad as a wifi for my apple laptop macosx 10.9.4

You need to activate Personal Hotspot for the iPad. This is often a charged service from your cell provider. Go to Settings - Personal Hotspot, and turn it on.

Here's the Apple page about the feature.

iOS: Understanding Personal Hotspot

Here is the Verizon information page, for example:

http://www.verizonwireless.com/support/devices/knowledge_base.html/64837/

Matt

If you have further iPad questions, please post here:

Using iPad

No "Classic operating system" can connect to iPads.

If you have questions about 10.9, please post to the Mavericks forum:

OS X Mavericks