tinting

Sounds dangerous.  Probably just mascara is a better idea.

I tint eyebrows and lashes. It's pretty safe if you have someone who is trained doing it for you. Basically its like a really mild dye that is carefully brushed on to your lashes or eyebrows (while youre eyes are closed and covered with cotton!) and left on for about 5 minutes.
I like to get mine tinted cuz my eyelashes are really sparse and so are my brows and it just makes them look a lot fuller. A few women I know who have light colored eyebrows and lashes like to get them tinted esp during the summer cuz its so easy and less messy than mascara.

But I don't recommend you do it yourself and find someone who is qualified to do it.

Hmm.. I'm not really sure. I don't live in the US and prices here are different. I would say it shouldn't be more than 10-15$ but I'm not sure. Try calling a few salons or day spas.It shouldn't be expensive and probably just a little more than eyebrow shaping. The brow tinting should be easier to find cuz I'd assume they do it at most hair salons.

If you find out, please let me know. I'd like to compare the prices here to the ones in the states.

I ALWAYS do my eyelashes.  I would go to a salon to do it.  It is really cheap..like aseya said maybe 15-20 tops.  You have to keep your eyes close for 15 minutes or so.  But I definitely would recommend it.  It gives your eyelashes a really nice look and they look so thick.  We spend the summer at the lake too on our boat...so I never wear makeup..and my eyelashes always look great!!!