1. Something to strip paint from plastic/metal without damaging it: Purple Power: pretty cheap. avalible at most auto stores. wont hurt models.
2. Good Brushes: You can waste money on cheaper brushes but generally sable works very well. Wisor neutons series 7s around size 0 is nice to work with. also masters brush soap (keep your brush clean

)
3. A good airbrush and compressor (reasonably priced): Badger renegade chromes are about 75-100 ish on amazon. harbor freight has a little
AB compressor with a water trap for like 80. its the set up i use. but i do get some moisture issues on occasion.
4. good paint brand: Personal preference is vallejo. just for the stability of the company. available on amazon.
Any advice or videos on how to airbrush and detail these models would also be very welcome. Once i have everything in hand i plan on starting a blog with my progress until completion of my army. I plan on painting them as codex blood angels and im really hoping they come out well! Looking forward to some great advice.
There are all sorts of videos on youtube.
Stop by a
GW and get your hands on your "FREE" Marine so you can practice on it. or use a spare metal one that you can speed strip if you really wanna practice (metal so you can stip it in acetone which takes like no time)
Dont forget to prime. Blacks give you deeper red. while priming white gives you a brighter red.
(harder for me to suggest red as i haven't painted red)