Hi,
1) No.
2) Yes.
3) You would be required to convert to pounds sterling, the market value of the gift using an exchange rate in use at the time the gift was made.
This would allow you to obtain your acquistion cost.
You would also have to convert the disposal value to pounds sterling, to work out the difference between the disposal value and allowable costs.
There is a calculator at
Tax when you sell property that will help.
You would be required to declare the disposal in a self assessment tax return, whether a gain arises or not.
Thank you.