That's a synthi aks (I think), pretty sure those guys run in the thousands, not hundreds haha. You can get DSI mophos for pretty cheap used, and the novation bass station is somewhere around 400 new. You can plug a guitar into some synths, not all. It's generally best to have a keyboard with it, at least when you're starting out. It seems like you want vintage analog stuff, and while vintage stuff is loads of fun it's not really meant for beginners, and you might get really frustrated with it really fast. If I were you I'd check out the mopho, the roland gaia, or the bass station. three great analog synths on a budget.