When you post a reply to a thread, put information in the box as normal. Then at the bottom of the reply box there is a box that states
'More options', then select
'upload a file'
- browse to the file you want, then select it, then select
'upload'.
Select 'full image'
Then post the reply as normal.
If you're asking for assistance it's polite to use some manners, a "please" would have been nice.... but you're welcome anyhow !
As for 'how do I use paypal' then I'd suggest you go to the Paypal webpage and check the FAQ section