Re: I need advice about modelling tools.
I have found that my most used metal carving tools are the ones with a blade shape in the metal end. Be carefull to choose ones where the wood at the contact with the metal is hefty enough for some seriously deep carving.
I often make my own with stout tight grained hardwood cut-offs and old bandsaw blades (you'll need some files and a grinder).
For the wooden tools: try them in your hands, if they are comfortable, and have a shape that orks well with your desired end result, then you've got a tool you'll use often. Here again, I make tools to fit the task, often making tools with specific curves for each piece.
Happy tool hunting.