Tamiya are world famous for there poly cap wheel system. It allows your model to be used as a "toy" if you so wish. Some Tamiya kits allow you to put a little motor and axle inside so that the AFV can travel along under its own steam.
And their Leopard was indeed also available motorised. This one has some holes in the hull floor for switches and things for that purpose, and Andrew may be able to see a moulded-in battery holder too (I’m not sure — the only Tamiya Leopard I ever built has its turret glued on so I can’t check).
You may also want to consider whether to stick the wheels on yet as it maybe easier for you to paint the hull and the wheels separetly and then stick them all together at the end. Do whatever you are most comfortable with.
My advice would be to leave the wheels separate, which the poly caps make very easy. The model has one-piece tracks that just pop round the wheels, and given the motorisable nature of the kit, the hull top probably comes loose too — a notch at the back and one or two big poly caps at the front, as I recall, so you can still put the wheels tracks on even after gluing the side skirts to the hull top, just as long as you don’t glue the hull top to the hull bottom.
In any case, Tamiya kits are probably your best bet if you’re wondering if you can put together a model. Stay well away from brands like Dragon or AFV Club until you’ve got a bit more experience, for example, as they tend to have many more, much smaller, and more fiddly parts.
BTW, Andrew, in the interest of historical accuracy I’ll point out that this doesn’t build into an Australian Leopard without some modifications. Of course, you may not care about that — just mentioning it in case you want to build a reasonably accurate model of one. If not, then ignore what I said
