Here's what I pay for these. Of course, it will differ depending on where you live and what/who you use.
Farrier-$60 for resets and $10 for new shoes. We use an Amish man who is excellent, but his prices are cheaper than most others. Around here, you'll find it to usually be around $100+ - every 6 to 8 weeks.
Vet-$25 for the barn call, plus whatever else he does. When need be.
Monthly Feed-I'm pretty sure a bag of feed is $16 for what I use. I'm not sure how many bags we go through a month.
Tack-I've gotten it at different times. English saddle-$799 including a pad, stirrups, cover, and bag. Bit-found on eBay
for $7, originally a lot more than that. Bridle-mine was a Christmas present, so 'm not sure.
Trailer-I'm looking to buy one that is about $1500.
Hay-My BO grows his own.
Blankets/Sheets-new, can be very expensive. I found my sheet for $25 and I don't have a winter blanket. Buy when needed.
Bedding-about $5 a bag around here.
I got a job as soon as I turned 16 to help my parents pay for it, and a majority of it I do pay for.
Again, prices depend on where you live.
Hope this helped. (: