First of all lets suppose you want a initial set to every vocation at lvl 8 leaving dawnport. I will consider you have some experience and some money since you want to buy them on market so will tell you what i would do in each vocation on lvl 8:
First of all I recommend if you have free time to do blessings( https://www.tibiawiki.com.br/Pilgrimage_of_Ashes_Quest) this quest make you get the blesses cheaper but need to be done before lvl 24.
Knight : pic one
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Druid/sorcerer:
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Paladins:
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Some choices like the helmet and the shield aren't the ones with best defense or stats but they make you save a lot of cap in lower levels. That is what I would buy if make a new low level character. If you need any help in gear upgrade through specific levels post on comment or send me a msg in private and I help you =)