First and formaost, look at the current market of the genre you are heading for.
There are hundreds of techno labels, send your stuff to them first, another label on the saturated market won`t do much.

No success?, ok, could be for a number of reasons.
1. You just don`t have good enough contacts for people to really bother listening to your stuff properly to give it time of day (a bummer, but common)
2. Your stuff might not fit the sound of the labels you sent it to (try to pick labels that fit your sound)
3. You`re a little ahead of the game, and people just don`t get what you are doing yet. (can be a good or bad thing)
4. Your music is just rubbish.

Right so the above may be applicable.

you then decided, for whatever reason, to start a label.
Be aware, it`s not glamourous, the market is saturated, you might lose sleep over it, vinyl as a saleable medium is becoming less and less viable, you probably won`t make any money, but if you are lucky you may just break even.

If you then are still one of the crazies who wants to start a label (and yes, I consider myself a crazy for doing it)

Decide on the tracks for the first few releases.
then send these tracks to some distributers to see if they will handle the record.
No distribution = no point making vinyl.

Next get about 850 quid together (would do you for 500 vinyl plus 2 colour labels, roughly)
Cut and press the records.

Promote like mad. Send promo`s to DJ`s and magazines, radio if possible.

Some additions you might consider.

Magazine adverts (if you have the money)
Record giveaways at promotion parties
There is always the tried and tested route of paying a well respected name to provide or remix a track for your label, but be aware any sales (fanbase) increase due to the addition of this big name, may well not carry over to your next release, that doesn`t have said big name.

P&D deals
Publishing and distribution.
You can talk to distributers and publishing companies who may be offering these deals.
Essentially, as with any music biz stuff with the word "deal" in it. It essentially involves offering your ass up to people you don`t really know, in return for getting your record out.
Basically, they will incurr all the risk by paying for manufacturing etc, all you need to do is provide the music and promote the music.
You will probably not make any money at all this way (not that money means everything, however, what you will be doing is essentially paying someone else for your hard work). I don`t really recommend this unless you get a really good deal.

There you go.
My main advice is talk to as many people who have labels as possible about it. Get a good broad idea of what to do and expect.
And in this process of communication you may well get contacts that might take your music, and thus shoulder the burden of releasing your music.