To use the wiki, you'll probably need an account - your University contact will be able to arrange a special account called a 'Confluence account' - with the Wiki software itself. You won't need a University staff account.
Once you have an account, you'll find you can log in to the Bath Spa Wiki.
Once you're logged in, you'll find you're able to use the wiki in the same way as member of staff. It's useful to remember that the Wiki is divided into 'Spaces' - with permissions set for each space, so it's possible that permissions will need to be set for you to use a particular space. Hopefully this will have been done at the same time as arranging your account, but if it appears not, get in touch with your 'University Wiki contact' and they'll sort it out.
Apart from that, when you need more help with using the Wiki, the information you need is the same as if you were a member of staff, so the following pages on using the Wiki as a viewer, or as a contributor will hopefully be helpful to you.
You should find you can view files attached to pages - and attach files yourself. Note the following:
All before you, in this world, is smoke and shadows.All before you, in this world, is smoke and shadows.
Words found on a door lintel in the garden of a house in the Cretan village of Argiroupolis.
The lintel is a fragment from the city state Lappa, which occupied the same site.
Fifteen hundred years later, when you use the web, from time to time you might well feel that the author was on to something. And if you work with particle physics, you'll know he was ...