Paypal integration type

Is it possible to have Paypal setup for products on one form, subscriptions on another form and donations on others for the same Paypal account?

Yes, you may use the same PayPal account to integrate different forms, here are some guides that may help you: 

https://www.jotform.com/help/391-How-to-Integrate-Form-with-Paypal-Standard-

https://www.jotform.com/help/165-Setting-Up-Your-First-Order-Form

https://www.jotform.com/help/166-How-to-Setup-a-Recurring-Payment-Option 

I hope this helps.