You said web wallet?please try to exclude the web wallet idea unless you will give users the advantage to hold their private keys,many web wallet don't do that and only few people will use them

I think you should focus on bitcoin only and when you have like 400$ or 500$ worth of bitcoin you can start considering other good altcoins like binance token

Deeponion project is the only crypto coin that has something to do with TOR network you should check it out using search engine,subtratium and Lethean are good too but they are VPN kinda based coins

You sound very confusing,POS doesnt need to work any block thing like you stated,the way you sound seem like you are pointing to masternode,we have different types of POS and all you need is hold some portion of the POS coin or token to get rewards based on the project,as for masternodes vs POS there is a difference  so go through this link to learn the difference
https://coinguides.org/staking-vs-masternodes/