just a question about this (cuz I don't know how pay pal works)

If I my (dad's) pay pal account's e-mail is not the same as my (my) tori accounts e-mail can I still buy TC
there's nothing that checks that?

You'll be fine. When you buy the creds an e-mail will be sent to the paypal account's address - it's got the voucher code in it.

Go to the Torishop, consume the voucher.

Then send a PM to RiseAgainst with the following info:

Voucher Code
Amount Purchased or Boosted
QI LEVEL

He'll sort your promotional items.