What colour foal can I get from a tobiano mare?

It is almost impossible to tell unless both Sire and Dam have been DNA matched for colors. What you are talking about doing is putting good money in stud fees, mare care for more than a year then feeding this foal for 2 years before you can start working it, sending it to a trainer who is going to charge you a minimum of $3000 to break and train the colt or filly before you can ride it, then you will have a horse that you have about $8000 in that is worth $200. do the math, buy a 2 year old and send it to be trained and you will still have a $200 horse but will only have $3000 in it.