I would suggest a clan wars match or fist of guthix match.or if you can fight hill giants like crazy.
kill lower lvls than you, such as cows.
By getting into fights with other charcters.
There are many places to train. Where you train depends on your combat level, and also on whether you want to use a melee attack, a ranged attack, or a magic attack. In general, try to attack...
No it can not train attack.