My 98 S10 starts slow I have to give it gas for it to but sometimes it doesn't even start when i turn it on all the electrical works but when i turn the key nothing happens no clicking noise?

Sounds like battery connections and or battery. Clean and tighten all battery connections including where it connects to the starter and engine block.

Disconnect the cables and use a wire brush until you can see fresh metal on both the battery and connector then reattach securely.

If corrosion is inside the wire ( green or white stuff ) you may need to replace the cables or at least cut them back till there is good wire and install new connectors.

Have the battery load tested to be sure it is good.