Hi Aslam,
Great questions! However, they really relate to the underlying ecommerce engine – WooCommerce – and so it may be better to seek clarification via WooThemes’ own support channels.
Basically though, WooCommerce Tickets should not inhibit you from using any of the payment systems provided or supported by WooCommerce itself. With regards to recouping PayPal fees, again that would really need to be something to seek advice on from WooCommerce’s own authors but to the best of my knowledge that isn’t natively supported and you would need to either write or obtain a customization to handle this or else just factor that in to the sale price as best you can.
Does that help?