@armanemadi:
Please allow me to comment - as another user of HikaShop, just like you.
First, I do understand that you have a specific style in mind for your website. However, style is a matter of (personal) taste, and no one will be able to match everyone else's taste. So, whatever template makers, or HikaShop with the "Style" add-on, are giving you, can only be just that: templates which you can continue building on.
Which is where CSS and other tools come in handy, and as Nicolas said, what you want to see is possible with CSS... where the documentation behind the link he gave you is already pretty helpful.
So, your questions 1-3 were already answered - in general. All details can't be given here, since HikaShop support and this forum are for features and functionality of the extension, but HikaShop cannot be responsible for the style of your website (and the many others, which want to look all different), or even create it for you.
As a result, and in general, it's impossible to get an individually customised website (with or without shop) if not at least HTML and CSS are properly understood and applied. If you cannot do it yourself, you may need to hire a (frontend) web designer to do it for you. Just be careful, I see here and in other forums plenty of 'self-declared web designers' having little or no clue of the "how-to"...
To your final question: If your present Joomla template in combination with HikaShop settings and customisation options doesn't do it for you, then
- either something is configured wrongly (for which you might get help here as far as HikaShop is concerned - if you show your relevant settings e.g. per screenshots and describe exactly what you want),
- or further customisation must be done (which, again, requires certain technical expertise somewhere at your end).
In any case, getting something for a handful of dollars that's both, perfectly working 'out of the box' and exactly matching your style idea, is a dream that won't come true. It does take extra effort and the mentioned expertise/skills, and in this regard web design is nothing different from many other areas of activity. Sorry, but so it goes.