Can be done. Price depends on your doctor

Yes it can be shortened to a limit of 1-2 mm after that depth u may feel sensitivity,if u want to reduce further then root canal treatment has to be done  bfre that,and then reduce..and u and go for cap placement after that...it's also called as smile design..it's can range from 3-5k for RCT of single tooth and cap from around 3-9k depending on the material u choose.varies from place to place

It would not be possible to give a rational looking without a look at the clinical condition of the teeth but as a General suggestion, we would prefer to avoid Trimming of the teeth. The Other treatment options which can improve your smile can be explained to you after the case evaluation only and the cost will also vary according to the treatment. Regards

You are asking this Q probably because your front two teeth are proclined (forward). Whatever it may be but shortening definitely is not the way out. Go for braces for correction.