In the past I had used the PSOC4 on a project. doses this chip will have a same price level of PSOC4 more o less ? Where I can find the price on volume?
The official information is not yet known, have a look here: How much will Psoc6 cost?
If you consider what is inside PSoC 4 and PSoC 6 device, it is not hard to guess that PSoC 6 will cost more.