Man some of these look in horrible conditions...
The only horrible looking one I can see is that of the Iraqi war against Iran photo, and considering the conditions in which the Iranians fought that war, (being under sanctions, lack of spare parts etc...) the tank's functionality was their main priority not it's look!
why do we even make these?
I want Iran to make high quality tank etc..
you can say it will be a waste of money, but it's not like they mass produce them.
look at the zulfiqar, they probably only made 100 of them.
It doesn't seem they're making any Scorpions at all, they're rather extending it's service life, for example the ZU-23 Scorpion idea, in my opinion, is because they don't want to waste money to replace the worn out 76mm cannon, instead they throw in what they already have in very large quantity, the ZU-23. I'm sure the Iranian army is very well aware of the ZU-23 weaknesses against modern aerial threats, that's why you see more ZU-23's in infantry support role on APV's, Scorpions and light trucks and the 35mm Orlikons in AAA role.
As for the Tosan project, it's very likely a research project like the Zulfiquar (probably due to lack of budget). These projects are treated as "good to have" but must wait until the priorities are realized kind of stuff based on the Iranian defense doctrine.
The Iranian defense doctrine seems to me very much like that of the Communist China during the 1950's to early 1990's, that is; spend most of your defense budget on prevention/deterrence assets i.e missile projects etc... every thing else such as ground, air, naval forces would be limited to research and experimental projects until the proper funding, base on priorities (recent navy build up is the best example of that) made possible, and the regular armed forces are maintained just about sufficient enough to deal with regional threats like the deposed Saddam or the Taliban.
For example China kept it's copy of Mig-19 i.e F-6 and it's T-59 tanks (inferior than the original T-54) in active service for almost 5 decades while keeping their enemies at bay by maintaining their deterrence force until enough money became available to modernize the regular armed forces as well.