assuming you alrrady did ur research and actualy know what your doing and how to run gear safely and properly, id go with test, eq and tbol.
probably going to get hated on for this but id run the test and eq at a gram a week each for 20 weeks and the tbol 100mg daily for the first and last 8 weeks of the cycle. and of course, if your wanting to be more conservitave, just half the doses.
so this cycle would look something like this:
weeks 1-8: test E 500-1000mg, EQ 570-1140mg, Tbol 50-100mg daily
weeks 9-12: run same doses and drop tbol
weeks 13-20: same dose but add the tbol back in.
weeks 21+: run a cruise
imo, pct is dumb. if your going to uses steroids, theres a 99% chance your not doing a single cycle and quitting, so id do blasting and cruising vs fully coming off. not only will it help sustain gains much better but its arguably healthier due to less hormanal fuckery and fluctiations
price will vary greatly. are you buting from china? shit will be pennies? buying from a "posh" domestic ugl? get ready to sell your kidneys for a vial of test.
no idea how much bloodwork costs in the eu but i like to get bloods done 4-6 times a year(im not rich, its just free, im canadian)
as far as diet goes, same old healthy diet you would be eating natural.
also recomend getting a fully comprehensive multivitamin and use an app like cronometer to see if your diet and supplements hit all the micronutrient goals