Ahh I'll be honest if you want to show me!
It always helps to ask on photo forums - people tend to be less polite esp if its a pro or semi pro forum and will give you good advice on how to improve.
A Canon450D will get you far enough - don't need to worry about that but if you are employed then you may need another camera body - just in case yours breaks on location. You never know what can happen.
Lighting is a very important one - if you can;t train then read lots and lots of books about it. A basic lighting set can be as little as £299 for 2 flash heads, stands, diffusers (look on Ebay) and is very useful if you want to pursue still life or portraiture.