No. Your US or UK client will need to have a PayPal account to send the payment, but the payment itself will land in your Payoneer account, so there’s no need for you to have a PayPal account, nor can we facilitate the opening of one.
There is a standard fee for the US: 3.99% + $0.49 fixed fee, or for the UK: 3.99% + £0.39. It is payable by either the requester or the sender.