You create the fixed asset account for the thing you buy in the chart of accounts, then on the purchase you use that fixed asset account as the expense (reason) for the payment.

If the Ipad is for the business, it is basically the same thing, create the ipad fixed asset account.

since you are effectively borrowing the money to pay for it, create a liability account title for who you make your payments to.
Then create an expense transaction like this
line one - the fixed asset account, enter the total amount including sales tax
line two - the loan liaibiblit account, enter the same amount as a negative number
save the zero dollar transaction
then when the company makes payments, you use the loan liability account as the expense for the payment

Since you will be paying for this with personal funds, but it should be paid for by the business, uyou do another zero dollar transaction
line one- loan liability account, $$$
line two - owner equity investment, -$$$  (negative amount)

When you pay sales tax for something, that sales tax is included in the cost of that something.