How much experience do you have caring for/riding horses? If not much, then you will need a quiet beginners horse. This is the main thing to look for when buying your horse, it doesnt matter so much about breed, colour etc. Do you have an experienced friend to help you look and travel with you when looking at horses? If not, many riding centres offer this service and it can be great for someone who is new.
As for the health side, get a vet check! and if you are skeptical about anything get a second opinion.
It may be an idea to trial a horse before you buy it, that way you know its definatly what you want before you spend a large amount of money.
Leasing a horse can be great to gain experience on, especially if this is your first horse. Its up to you really
What is the best way to get money for them
Im not sure what you mean by this, do you mean payment methods?
If you dont have an area to keep the horse where you live, you will need to look for somewhere to board it. I cant offer much advice with this as ive never boarded a horse, but many people on this forum have and will be able to help you.
Do you know anyone with a trailer that could help you transport the horse? Maybe your uncle? If not, depending on where you live, there may be horse transport companies you can use, especially if the horse is coming from quite a long way. You can also hire floats, however if you've never used one its best to have someone experienced with you, as there are many things that can go wrong with transporting horses.
ETA: Do you get lessons? If not, i highly suggest it. You can gain experience caring for/riding horses quite quickly, alot better than if you were trying to learn alone, which i would not suggest