Can I use a paid subscription on two pc's at my house

Yes, John.

You can use your AVG Internet Security - Unlimited on multiple Windows and Android device.

Refer the following article: http://support.avg.com/SupportArticleView?urlname=Download-and-install-AVG-Protection to install AVG Internet Security Unlimited and activate it using the email address registered with AVG.

I have paid subscription on one pc at my house.  Can I use the same subscription for another pc, which uses a different email at the same ip address?

Yes, John.

You can use your AVG Internet Security - Unlimited on multiple Windows and Android device.

Refer the following article: http://support.avg.com/SupportArticleView?urlname=Download-and-install-AVG-Protection to install AVG Internet Security Unlimited and activate it using the email address registered with AVG.