I want to start learning after I get a job and start making money..but I'm wondering whether I would be able to do it.
I'm 17 years old and have no experience in music at all. I just think the cello sounds beautiful

What I want to know is:
Is it really difficult to learn, and how much money would I need to pay for a decent cello ?

iam 17 also and started playing cello when i was 15 and i dont think its that difficult to learn

Hi, I started when I was 23. And I think, that yes, it is difficult to reach a level, where You can enjoy playing nice pieces compared to a guitar for example. Your hands needs to get used to the positions, etc. However, it is worth to be a little patient, and there are a lot of positive feedbacks on the road, so it is enjoyable. So, to sum up; You are not late, and if You really like it, just do it, don't hesitate and good luck!

Ach, and the cello; regarding this, a lot of people have different opinions. This thing highly depends Your possibilities. In my city, I can rent a good cello at the music school for $15 a half year. Yep, it is that cheap. But if renting is not an option, You can buy a cheap one, bring it to the luthier and buy new strings. This is what I did, so from ~$350 I got a cello with a hard case, that's good for learning, although probably You'll need to change that later. Also, if Your financial status is really good: I advise You to find somebody who knows cellos well, and look for a really good used one, and buy it. And if You really have a LOT of money, and don't You know what to do with it, and also, You are really serious about the thing: just go to a luthier and ask Him/Her to make one for You :-D