Leasing an english horse?

Well for the tack stuff I've never been in a lease where they provide tack so you're lucky if you do find someone to provide it and they usually charge extra. If you have never really done english then you need lessons. You ride a lot different than in western, there's more balance required in english. The only horse in that ad I would recommend for you would be "Calise "Spungold Givemewings" as it sounds like a patient horse as even though you have been riding for a long time you'll find your balance won't be very strong in english where you'll want an easier horse. That last horse also does western so you could always stick to western. If I were you I would just get a cheap saddle off of ebay (I had an english saddle from there for about 50$) unless you want quality then go with doversaddlery.com or maybe stateline.com. Western saddles will be more expensive though.