Can we take picture of the graffiti/painting/sculptures outside in winwood walls or is there a copyright ?

Definitely pictures are encouraged to spread the word

You can take pictures, and it's encouraged. The graffiti artists are not paid - support them by shopping in the gallery at the rear of premises.

Yes

Yes u can

You can

You can take pictures. If staff is free, they'll even take them for you so you can pose in front of them.