Takayama Hokuriku Area tourist pass

Can I use the 5 day TAKAYA HOKURIKU PASS as follows:
1. Kyoto to Takayama
2. Takayama to Okuhida
3. Okuhida to Shirakawago
4. Shirakawago to kanazawa
5. Kanazawa to Kyoto

1. Kyoto to Takayama

Only if you travel via Kanazawa.

2. Takayama to Okuhida

Not covered.

3. Okuhida to Shirakawago

Only the Takayama-Shirakawago section is covered.

4. Shirakawago to kanazawa

Covered.

5. Kanazawa to Kyoto

Covered.

Please check the basics here:
http://www.japan-guide.com/e/e2361_takayama_hokuriku.html

Does this Pass cover bus from Kanazawa to Shirakawa-go? Thanks.

yes

Does it cover Kansai Airport to Kanazawa? And Gifu to Chubu Central International Airport?

No and No.
http://www.japan-guide.com/e/e2361_takayama_hokuriku.html

Is it possible to purchase 2 passes as each pass is valid for only 5 days, and hence I'll be able to use the 2 passes for 10 days? 5 days each? Instead of purchasing the JR rail pass which is twice the amount of getting 2 tourist passes.
Thanks.

Does this pass cover Nagoya to Toyama (with surcharge for TateYama to Toyama section)

Thanks, Chan

Does this pass cover Nagoya to Toyama

No, only as far as Takayama. A map of the coverage area can be seen here:
http://www.japan-guide.com/e/e2361_takayama_hokuriku.html