Stove tops cannot be just repainted. They have to be re-porcelained to withstand the heat.
Any high heat paint you use will be considered toxic and not suitable for food contact.
Also, even though it is high heat, the heat from the burners will cause the paint around them to darken or discolor withing a few weeks and you would need to reapply the paint.
Also, that glossy black finish you are looking for cannot be replicated easily or to the level that you would see with stove that has the original or re-porcelain top.
It's also very, very time consuming and requires multiple steps and a very steady hand and patience to make the paint look decent. It's not like painting a wall. You do it wrong even just a little bit, the paint will peel and the stove will look 40 years old instead of 20.
If price is an issue, get the basic model of stove, whether from sears, lowes or home depot. Those big box stores are gonna give you the best prices most likely. The fridge can be a basic model too. Clean looking with good amount of space. It doesn't need all the frills of a french door or juice draw.