Pre-apprenticeship or pre-vocational courses are not a pre-requisite to getting an apprenticeship or traineeship. However, there are some industries, such as the electrical and construction industries, in which employers often prefer to hire someone who has completed a pre-apprenticeship.
Pre-apprenticeships give you the basic skills and knowledge in the industry that you want to work in and may even contribute to reduce the duration of an apprenticeship or traineeship.
Use the Pre-apprenticeship Finder on this site to search for pre-apprenticeships and providers in your location.
It can also be a good strategy to approach local providers like TAFE to ask what they have on offer.