No 1.firstly bank interest is taxed at your personal tax...

No 1.

firstly bank interest is taxed at your personal tax rate...No tax is paid on your first 18200...Above that then 19c in the $ changes again higher incomes..
Just declare your interest and has no bearing on Cap Gains..

Dividends hopefully are fully franked...ie tax paid...No tax implications...But check your accountant with part franked and imputation credits...I like fully franked dividends of course!

And No 2...No you cant claim dividends against capital losses...Capital gains can only be offset by capital losses..

I hope that helps and capital losses can be carried into future years...Like mine of the last year....Thanks PRR!