Yes, you should be able to get 90 pet scrolls,

I did this when I bought 4000 points, as far as I remember I got 60 scrolls

Some days back, youll get 25 scrolls for 1,500 points which was better than it is today.. hope they get that one back or make it 35 scrolls for 2000 points..

As for the last question, im not sure about your payment method but Iam able to buy points using 1 paypal account to my accounts