First off, if your site is only ever going to be in english, you dont need to use the language feature, that will make it simpler.
so instead of:
<span>{jrCore_icon icon="calendar" size="16" color="ff5500"} {jrCore_lang skin="jrAudioPro" id=97 default="Genre: "} {$profile_genre} </span>
you can just use:
<span>{jrCore_icon icon="calendar" size="16" color="ff5500"} Genre: {$profile_genre} </span>
It really depends on how you like to work. The language strings are there for users who want to be able to customize the site without the need to look at code. If you're comfortable looking at code the best workflow (the one I like) is to keep out of the ACP for all skin customizations. There is an over-ride system for working with templates that allows you to adjust at the coding level.
From the question im making the assumption you're using the TEMPLATES tab to make your changes. The other way to do it is to clone your skin, then make adjustments via SFTP. Which you prefer depends on you comfort level with code.
For web developers the preferred workflow (the one I like) is:
* clone the skin from jrAudioPro to xxAudioProCustom (or any name you choose)
* download xxAudioProCustom into your development environment (I use phpstorm)
* adjust the xxAudioProCustom/profile_sidebar.tpl and upload it back to the site
* (either) run the site in "Developer Mode" so the caches are off, (OR) reset the caches to see your changes.
(repeat)
back to the question:
1. you will need to find out what the correct variable is that holds the quota id, for that adding {debug} to the templates will get you a list of what variables are available in each template, see these docs for more info:
Docs: {debug}
https://www.jamroom.net/the-jamroom-network/documentation/module-developer-guide/1477/debug
it will probably be something like:
{if $_profile.quota_id == 3}
show whatever you want to quota id 3 here.
{/if}
2. add your new form field to the "Additional search fields" section of the ACP then rebuild the search index:
https://www.jamroom.net/the-jamroom-network/documentation/modules/950/search#rebuild-the-search-index
3. check it for string length
{if strlen($profile_genre) > 0}
this will show if the string length of the $profile_genre field is longer than zero characters
{/if}